diff --git a/apps/backend/apps/client/src/submission/submission.service.spec.ts b/apps/backend/apps/client/src/submission/submission.service.spec.ts
index d0e3f465e0..278382c01e 100644
--- a/apps/backend/apps/client/src/submission/submission.service.spec.ts
+++ b/apps/backend/apps/client/src/submission/submission.service.spec.ts
@@ -3,7 +3,13 @@ import { NotFoundException } from '@nestjs/common'
 import { ConfigService } from '@nestjs/config'
 import { Test, type TestingModule } from '@nestjs/testing'
 import { AmqpConnection } from '@golevelup/nestjs-rabbitmq'
-import { Language, ResultStatus, Role, type User } from '@prisma/client'
+import {
+  Language,
+  ResultStatus,
+  Role,
+  type Contest,
+  type User
+} from '@prisma/client'
 import { expect } from 'chai'
 import { plainToInstance } from 'class-transformer'
 import { TraceService } from 'nestjs-otel'
@@ -38,6 +44,9 @@ const db = {
     findUnique: stub(),
     update: stub()
   },
+  contest: {
+    findFirstOrThrow: stub()
+  },
   contestProblem: {
     findUniqueOrThrow: stub(),
     findFirstOrThrow: stub()
@@ -46,7 +55,8 @@ const db = {
     findUniqueOrThrow: stub()
   },
   contestRecord: {
-    findUniqueOrThrow: stub()
+    findUniqueOrThrow: stub(),
+    update: stub()
   },
   user: {
     findFirstOrThrow: stub(),
@@ -57,6 +67,21 @@ const db = {
 
 const CONTEST_ID = 1
 const WORKBOOK_ID = 1
+const mockContest: Contest = {
+  id: CONTEST_ID,
+  createdById: 1,
+  groupId: 1,
+  title: 'SKKU Coding Platform 모의대회',
+  description: 'test',
+  invitationCode: 'test',
+  startTime: new Date(),
+  endTime: new Date(),
+  isVisible: true,
+  isRankVisible: true,
+  enableCopyPaste: true,
+  createTime: new Date(),
+  updateTime: new Date()
+}
 
 describe('SubmissionService', () => {
   let service: SubmissionService
@@ -121,6 +146,7 @@ describe('SubmissionService', () => {
   describe('submitToContest', () => {
     it('should call createSubmission', async () => {
       const createSpy = stub(service, 'createSubmission')
+      db.contest.findFirstOrThrow(mockContest)
       db.contestRecord.findUniqueOrThrow.resolves({
         contest: {
           groupId: 1,
@@ -216,6 +242,60 @@ describe('SubmissionService', () => {
       expect(publishSpy.calledOnce).to.be.true
     })
 
+    it('should create submission with contestId', async () => {
+      const publishSpy = stub(amqpConnection, 'publish')
+      db.problem.findUnique.resolves(problems[0])
+      db.submission.create.resolves({
+        ...submissions[0],
+        contestId: CONTEST_ID
+      })
+      db.submission.findMany.resolves(submissions)
+      expect(
+        await service.createSubmission(
+          submissionDto,
+          problems[0],
+          submissions[0].userId,
+          { contestId: CONTEST_ID }
+        )
+      ).to.be.deep.equal({ ...submissions[0], contestId: CONTEST_ID })
+      expect(publishSpy.calledOnce).to.be.true
+    })
+
+    it('should throw conflict found exception if user has already gotten AC', async () => {
+      const publishSpy = stub(amqpConnection, 'publish')
+      db.problem.findUnique.resolves(problems[0])
+      db.submission.create.resolves(submissions[0])
+      db.submission.findMany.resolves([{ result: ResultStatus.Accepted }])
+
+      await expect(
+        service.createSubmission(
+          submissionDto,
+          problems[0],
+          submissions[0].userId,
+          { contestId: CONTEST_ID }
+        )
+      ).to.be.rejectedWith(ConflictFoundException)
+      expect(publishSpy.calledOnce).to.be.false
+    })
+
+    it('should create submission with workbookId', async () => {
+      const publishSpy = stub(amqpConnection, 'publish')
+      db.problem.findUnique.resolves(problems[0])
+      db.submission.create.resolves({
+        ...submissions[0],
+        workbookId: WORKBOOK_ID
+      })
+      expect(
+        await service.createSubmission(
+          submissionDto,
+          problems[0],
+          submissions[0].userId,
+          { workbookId: WORKBOOK_ID }
+        )
+      ).to.be.deep.equal({ ...submissions[0], workbookId: WORKBOOK_ID })
+      expect(publishSpy.calledOnce).to.be.true
+    })
+
     it('should throw exception if the language is not supported', async () => {
       const publishSpy = stub(amqpConnection, 'publish')
       db.problem.findUnique.resolves(problems[0])
@@ -280,19 +360,24 @@ describe('SubmissionService', () => {
           ]
         }
       }
-
+      db.submission.update.resolves(submissions[0])
       await expect(service.handleJudgerMessage(target)).to.be.rejectedWith(
         UnprocessableDataException
       )
+      db.submission.update.reset()
     })
   })
 
   describe('updateSubmissionResult', () => {
     it('should call update submission result', async () => {
       db.submission.update.reset()
-      db.submission.update.resolves(submissions[0])
+      db.submission.update.resolves({
+        ...submissions[0],
+        contestId: CONTEST_ID
+      })
       db.problem.findFirstOrThrow.resolves(problems[0])
       db.problem.update.reset()
+
       submissionResults.forEach((result, index) => {
         db.submissionResult.create.onCall(index).resolves(result)
       })
diff --git a/apps/backend/apps/client/src/submission/submission.service.ts b/apps/backend/apps/client/src/submission/submission.service.ts
index 8568d57f56..0c88ba6909 100644
--- a/apps/backend/apps/client/src/submission/submission.service.ts
+++ b/apps/backend/apps/client/src/submission/submission.service.ts
@@ -111,7 +111,18 @@ export class SubmissionService implements OnModuleInit {
     groupId = OPEN_SPACE_ID
   ) {
     const now = new Date()
-
+    await this.prisma.contest.findFirstOrThrow({
+      where: {
+        id: contestId,
+        groupId,
+        startTime: {
+          lte: now
+        },
+        endTime: {
+          gt: now
+        }
+      }
+    })
     const { contest } = await this.prisma.contestRecord.findUniqueOrThrow({
       where: {
         // eslint-disable-next-line @typescript-eslint/naming-convention
@@ -192,8 +203,6 @@ export class SubmissionService implements OnModuleInit {
     userId: number,
     idOptions?: { contestId?: number; workbookId?: number }
   ) {
-    let submission: Submission
-
     if (!problem.languages.includes(submissionDto.language)) {
       throw new ConflictFoundException(
         `This problem does not support language ${submissionDto.language}`
@@ -219,23 +228,45 @@ export class SubmissionService implements OnModuleInit {
       ...data
     }
 
-    if (idOptions && idOptions.contestId) {
-      submission = await this.prisma.submission.create({
-        data: { ...submissionData, contestId: idOptions.contestId }
+    // idOptions Object가 undefined이거나 contestId와 workbookId가 모두 없는 경우
+    if (
+      idOptions === undefined ||
+      (!idOptions.contestId && !idOptions.workbookId)
+    ) {
+      const submission = await this.prisma.submission.create({
+        data: submissionData
       })
-    } else if (idOptions && idOptions.workbookId) {
-      submission = await this.prisma.submission.create({
-        data: { ...submissionData, workbookId: idOptions.workbookId }
+      await this.publishJudgeRequestMessage(code, submission)
+      return submission
+    }
+
+    if (idOptions.contestId) {
+      // 해당 contestId에 해당하는 Contest에서 해당 problemId에 해당하는 문제로 AC를 받은 submission이 있는지 확인
+      const hasPassed = await this.hasPassedProblem(userId, {
+        problemId: problem.id,
+        contestId: idOptions.contestId
       })
-    } else {
-      submission = await this.prisma.submission.create({
-        data: submissionData
+      if (hasPassed) {
+        throw new ConflictFoundException(
+          'You have already gotten AC for this problem'
+        )
+      }
+      const submission = await this.prisma.submission.create({
+        data: { ...submissionData, contestId: idOptions.contestId }
       })
+
+      await this.publishJudgeRequestMessage(code, submission)
+      return submission
     }
 
-    await this.publishJudgeRequestMessage(code, submission)
+    if (idOptions.workbookId) {
+      const submission = await this.prisma.submission.create({
+        data: { ...submissionData, workbookId: idOptions.workbookId }
+      })
 
-    return submission
+      await this.publishJudgeRequestMessage(code, submission)
+      return submission
+    }
   }
 
   isValidCode(code: Snippet[], language: Language, templates: Template[]) {
@@ -439,6 +470,66 @@ export class SubmissionService implements OnModuleInit {
         }
       })
     }
+
+    // contestId가 있는 경우에는 contestRecord 업데이트
+    // participants들의 score와 penalty를 업데이트
+    if (submission.userId && submission.contestId) {
+      const contestId = submission.contestId
+      const userId = submission.userId
+      let toBeAddedScore = 0,
+        toBeAddedPenalty = 0,
+        toBeAddedAcceptedProblemNum = 0,
+        isFinishTimeToBeUpdated = false
+      const contestRecord = await this.prisma.contestRecord.findUniqueOrThrow({
+        where: {
+          // eslint-disable-next-line @typescript-eslint/naming-convention
+          contestId_userId: {
+            contestId,
+            userId
+          }
+        },
+        select: {
+          id: true,
+          acceptedProblemNum: true,
+          score: true,
+          totalPenalty: true,
+          finishTime: true
+        }
+      })
+
+      if (resultStatus === ResultStatus.Accepted) {
+        toBeAddedScore = (
+          await this.prisma.contestProblem.findFirstOrThrow({
+            where: {
+              contestId,
+              problemId: submission.problemId
+            },
+            select: {
+              score: true
+            }
+          })
+        ).score
+        isFinishTimeToBeUpdated = true
+        toBeAddedAcceptedProblemNum = 1
+      } else {
+        toBeAddedPenalty = 1
+      }
+
+      await this.prisma.contestRecord.update({
+        where: {
+          id: contestRecord.id
+        },
+        data: {
+          acceptedProblemNum:
+            contestRecord.acceptedProblemNum + toBeAddedAcceptedProblemNum,
+          score: contestRecord.score + toBeAddedScore,
+          totalPenalty: contestRecord.totalPenalty + toBeAddedPenalty,
+          finishTime: isFinishTimeToBeUpdated
+            ? submission.updateTime
+            : contestRecord.finishTime
+        }
+      })
+    }
   }
 
   // FIXME: Workbook 구분
diff --git a/apps/backend/prisma/migrations/20240408084124_add_finish_time_on_contest_record/migration.sql b/apps/backend/prisma/migrations/20240408084124_add_finish_time_on_contest_record/migration.sql
new file mode 100644
index 0000000000..a7661dd980
--- /dev/null
+++ b/apps/backend/prisma/migrations/20240408084124_add_finish_time_on_contest_record/migration.sql
@@ -0,0 +1,2 @@
+-- AlterTable
+ALTER TABLE "contest_record" ADD COLUMN     "finish_time" TIMESTAMP(3);
diff --git a/apps/backend/prisma/schema.prisma b/apps/backend/prisma/schema.prisma
index 8443e3841c..3fba1c0ca7 100644
--- a/apps/backend/prisma/schema.prisma
+++ b/apps/backend/prisma/schema.prisma
@@ -297,6 +297,7 @@ model ContestProblem {
   contestId  Int      @map("contest_id")
   problem    Problem  @relation(fields: [problemId], references: [id], onDelete: Cascade)
   problemId  Int      @map("problem_id")
+  // 각 문제의 점수 (비율 아님)
   score      Int      @default(0)
   createTime DateTime @default(now()) @map("create_time")
   updateTime DateTime @updatedAt @map("update_time")
@@ -321,16 +322,19 @@ model Announcement {
 }
 
 model ContestRecord {
-  id                 Int      @id @default(autoincrement())
-  contest            Contest  @relation(fields: [contestId], references: [id], onDelete: Cascade)
-  contestId          Int      @map("contest_id")
-  user               User?    @relation(fields: [userId], references: [id], onDelete: SetNull)
-  userId             Int?     @map("user_id")
-  acceptedProblemNum Int      @default(0) @map("accepted_problem_num")
-  score              Int      @default(0)
-  totalPenalty       Int      @default(0) @map("total_penalty")
-  createTime         DateTime @default(now()) @map("create_time")
-  updateTime         DateTime @updatedAt @map("update_time")
+  id                 Int       @id @default(autoincrement())
+  contest            Contest   @relation(fields: [contestId], references: [id], onDelete: Cascade)
+  contestId          Int       @map("contest_id")
+  user               User?     @relation(fields: [userId], references: [id], onDelete: SetNull)
+  userId             Int?      @map("user_id")
+  acceptedProblemNum Int       @default(0) @map("accepted_problem_num")
+  score              Int       @default(0)
+  // finishTime: Pariticipant가 가장 최근에 AC를 받은 시각
+  finishTime         DateTime? @map("finish_time")
+  // totalPenalty: Submission 시, AC를 받지 못했을 때, 올라가는 Counter
+  totalPenalty       Int       @default(0) @map("total_penalty")
+  createTime         DateTime  @default(now()) @map("create_time")
+  updateTime         DateTime  @updatedAt @map("update_time")
 
   @@unique([contestId, userId])
   @@map("contest_record")
diff --git a/apps/backend/prisma/seed.ts b/apps/backend/prisma/seed.ts
index 4edb19eb92..75bf8da8f9 100644
--- a/apps/backend/prisma/seed.ts
+++ b/apps/backend/prisma/seed.ts
@@ -1301,7 +1301,8 @@ const createContests = async () => {
       data: {
         order: problem.id - 1,
         contestId: ongoingContests[0].id,
-        problemId: problem.id
+        problemId: problem.id,
+        score: problem.id * 10
       }
     })
   }
@@ -1700,7 +1701,6 @@ const createCodeDrafts = async () => {
 
 const createContestRecords = async () => {
   const contestRecords: ContestRecord[] = []
-  let i = 0
   // group 1 users
   const group1Users = await prisma.userGroup.findMany({
     where: {
@@ -1712,12 +1712,11 @@ const createContestRecords = async () => {
       data: {
         userId: user.userId,
         contestId: 1,
-        acceptedProblemNum: user.userId,
-        totalPenalty: i * 60
+        acceptedProblemNum: 0,
+        totalPenalty: 0
       }
     })
     contestRecords.push(contestRecord)
-    i++
   }
 
   // upcoming contest에 참가한 User 1의 contest register를 un-register하는 기능과,
diff --git a/collection/client/Submission/Create Submission/404: No Contest found.bru b/collection/client/Submission/Create Submission/404: No Contest found.bru
new file mode 100644
index 0000000000..cdd51d0843
--- /dev/null
+++ b/collection/client/Submission/Create Submission/404: No Contest found.bru	
@@ -0,0 +1,59 @@
+meta {
+  name: 404: No Contest found
+  type: http
+  seq: 5
+}
+
+post {
+  url: {{baseUrl}}/submission?problemId=1&contestId=999
+  body: json
+  auth: none
+}
+
+params:query {
+  problemId: 1
+  contestId: 999
+  ~groupId: 1
+  ~workbookId: 1
+}
+
+body:json {
+  {
+    "code": [
+      {
+        "id": 1,
+        "text": "#include <stdio.h>\nint main() { int a, b; scanf(\"%d%d\", &a, &b); printf(\"%d\\n\", a - b);}",
+        "locked": false
+      }
+    ],
+    "language": "C"
+  }
+}
+
+assert {
+  res.body.message: eq "No Contest found"
+  res.body.error: eq "Not Found"
+  res.body.statusCode: eq 404
+}
+
+script:pre-request {
+  await require("./login").loginUser(req);
+}
+
+docs {
+  ## 404: No Contest found
+  
+  존재하지 `Contest`에 Submission을 제출합니다.
+  
+  ### Query
+  
+  > 필수 query는 * 표시하였습니다.
+  
+  | 이름 | 타입 | 설명 |
+  |-----|-----|-----|
+  |problemId *|Integer|문제 ID|
+  |groupId|Integer|문제가 속한 Group ID (default: 1)|
+  |contestId|Integer|문제가 속한 대회 ID|
+  |workbookId|Integer|문제가 속한 문제집 ID|
+  
+}
diff --git a/collection/client/Submission/Create Submission/Succeed.bru b/collection/client/Submission/Create Submission/Succeed.bru
index ef8c516a8a..bdfc9450c8 100644
--- a/collection/client/Submission/Create Submission/Succeed.bru	
+++ b/collection/client/Submission/Create Submission/Succeed.bru	
@@ -10,10 +10,10 @@ post {
   auth: none
 }
 
-query {
+params:query {
   problemId: 1
-  ~groupId: 1
   ~contestId: 1
+  ~groupId: 1
   ~workbookId: 1
 }
 
diff --git a/collection/client/Submission/Create Submission/Succeed: Contest(AC).bru b/collection/client/Submission/Create Submission/Succeed: Contest(AC).bru
new file mode 100644
index 0000000000..9d919a1a8e
--- /dev/null
+++ b/collection/client/Submission/Create Submission/Succeed: Contest(AC).bru	
@@ -0,0 +1,73 @@
+meta {
+  name: Succeed: Contest(AC)
+  type: http
+  seq: 4
+}
+
+post {
+  url: {{baseUrl}}/submission?problemId=1&contestId=1
+  body: json
+  auth: none
+}
+
+params:query {
+  problemId: 1
+  contestId: 1
+  ~groupId: 1
+  ~workbookId: 1
+}
+
+body:json {
+  {
+    "code": [
+      {
+        "id": 1,
+        "text": "#include <stdio.h>\nint main() { int a, b; scanf(\"%d%d\", &a, &b); printf(\"%d\\n\", a + b);}",
+        "locked": false
+      }
+    ],
+    "language": "C"
+  }
+}
+
+assert {
+  res.body.id: isNumber
+  res.body.userId: isNumber
+  res.body.problemId: isNumber
+  res.body.contestId: isNumber
+  res.body.workbookId: isNull
+  res.body.code: isArray
+  res.body.code[0]: isJson
+  res.body.codeSize: isNumber
+  res.body.language: isString
+  res.body.result: isString
+  res.body.createTime: isString
+  res.body.updateTime: isString
+}
+
+script:pre-request {
+  await require("./login").loginUser(req);
+}
+
+docs {
+  ## Create Submission (AC)
+  
+  `Contest`에 AC 판정을 받는 코드를 제출하여, 채점 요청을 보냅니다.
+  
+  ### Query
+  
+  > 필수 query는 * 표시하였습니다.
+  
+  | 이름 | 타입 | 설명 |
+  |-----|-----|-----|
+  |problemId *|Integer|문제 ID|
+  |groupId|Integer|문제가 속한 Group ID (default: 1)|
+  |contestId|Integer|문제가 속한 대회 ID|
+  |workbookId|Integer|문제가 속한 문제집 ID|
+  
+  ### Error Case
+  
+  #### 404: No Contest found
+  
+  현재 진행 중이지 않는 `Contest`에 `Submission`을 Create하려는 경우
+}
diff --git a/collection/client/Submission/Create Submission/Succeed: Contest(TLE).bru b/collection/client/Submission/Create Submission/Succeed: Contest(TLE).bru
new file mode 100644
index 0000000000..f54308f94a
--- /dev/null
+++ b/collection/client/Submission/Create Submission/Succeed: Contest(TLE).bru	
@@ -0,0 +1,74 @@
+meta {
+  name: Succeed: Contest(TLE)
+  type: http
+  seq: 3
+}
+
+post {
+  url: {{baseUrl}}/submission?problemId=1&contestId=1
+  body: json
+  auth: none
+}
+
+params:query {
+  problemId: 1
+  contestId: 1
+  ~groupId: 1
+  ~workbookId: 1
+}
+
+body:json {
+  {
+    "code": [
+      {
+        "id": 1,
+        "text": "#include <stdio.h>\nint main() { int a, b; scanf(\"%d%d\", &a, &b); while(1);}",
+        "locked": false
+      }
+    ],
+    "language": "C"
+  }
+}
+
+assert {
+  res.body.id: isNumber
+  res.body.userId: isNumber
+  res.body.problemId: isNumber
+  res.body.contestId: isNumber
+  res.body.workbookId: isNull
+  res.body.code: isArray
+  res.body.code[0]: isJson
+  res.body.codeSize: isNumber
+  res.body.language: isString
+  res.body.result: isString
+  res.body.createTime: isString
+  res.body.updateTime: isString
+}
+
+script:pre-request {
+  await require("./login").loginUser(req);
+}
+
+docs {
+  ## Create Submission (TLE)
+  
+  `Contest`에 TLE 판정을 받는 코드를 제출하여, 채점 요청을 보냅니다.
+  
+  ### Query
+  
+  > 필수 query는 * 표시하였습니다.
+  
+  | 이름 | 타입 | 설명 |
+  |-----|-----|-----|
+  |problemId *|Integer|문제 ID|
+  |groupId|Integer|문제가 속한 Group ID (default: 1)|
+  |contestId|Integer|문제가 속한 대회 ID|
+  |workbookId|Integer|문제가 속한 문제집 ID|
+  
+  ### Error Case
+  
+  #### 404: No Contest found
+  
+  현재 진행 중이지 않는 `Contest`에 `Submission`을 Create하려는 경우
+  
+}
diff --git a/collection/client/Submission/Create Submission/Succeed: Contest(WA).bru b/collection/client/Submission/Create Submission/Succeed: Contest(WA).bru
new file mode 100644
index 0000000000..432dd3d4fa
--- /dev/null
+++ b/collection/client/Submission/Create Submission/Succeed: Contest(WA).bru	
@@ -0,0 +1,68 @@
+meta {
+  name: Succeed: Contest(WA)
+  type: http
+  seq: 2
+}
+
+post {
+  url: {{baseUrl}}/submission?problemId=1&contestId=1
+  body: json
+  auth: none
+}
+
+params:query {
+  problemId: 1
+  contestId: 1
+  ~groupId: 1
+  ~workbookId: 1
+}
+
+body:json {
+  {
+    "code": [
+      {
+        "id": 1,
+        "text": "#include <stdio.h>\nint main() { int a, b; scanf(\"%d%d\", &a, &b); printf(\"%d\\n\", a - b);}",
+        "locked": false
+      }
+    ],
+    "language": "C"
+  }
+}
+
+assert {
+  res.body.id: isNumber
+  res.body.userId: isNumber
+  res.body.problemId: isNumber
+  res.body.contestId: isNumber
+  res.body.workbookId: isNull
+  res.body.code: isArray
+  res.body.code[0]: isJson
+  res.body.codeSize: isNumber
+  res.body.language: isString
+  res.body.result: isString
+  res.body.createTime: isString
+  res.body.updateTime: isString
+}
+
+script:pre-request {
+  await require("./login").loginUser(req);
+}
+
+docs {
+  ## Create Submission (WA)
+  
+  `Contest`에 WA 판정을 받는 코드를 제출하여, 채점 요청을 보냅니다.
+  
+  ### Query
+  
+  > 필수 query는 * 표시하였습니다.
+  
+  | 이름 | 타입 | 설명 |
+  |-----|-----|-----|
+  |problemId *|Integer|문제 ID|
+  |groupId|Integer|문제가 속한 Group ID (default: 1)|
+  |contestId|Integer|문제가 속한 대회 ID|
+  |workbookId|Integer|문제가 속한 문제집 ID|
+  
+}