diff --git a/src/dokyu/parser/docstring/arg.py b/src/dokyu/parser/docstring/arg.py
index dcee2e6..9723806 100644
--- a/src/dokyu/parser/docstring/arg.py
+++ b/src/dokyu/parser/docstring/arg.py
@@ -10,12 +10,22 @@
 
 
 def to_argument(arg: list[Any]) -> Parser[str, Argument]:
+    is_optional = False
     name, type_, description_ = arg
-    type = type_[0] if type_ else None
+
+    if type_:
+        type = type_[0].strip()
+        assert isinstance(type, str)
+        if type.endswith("optional"):
+            is_optional = True
+            type = type[: type.rfind(",")].strip()
+    else:
+        type = None
+
     description_first_line = description_[0]
     description_rest_lines = description_[1]
     description = " ".join([description_first_line] + description_rest_lines)
-    return success(Argument(name=name, type=type, description=description))
+    return success(Argument(name=name, type=type, is_optional=is_optional, description=description))
 
 
 def to_arguments(args: list[Any]) -> Parser[str, list[Argument]]:
@@ -25,7 +35,7 @@ def to_arguments(args: list[Any]) -> Parser[str, list[Argument]]:
 class ArgsParser(ParserContext, whitespace=None):
     next_line = "\n" & indent
     blank_line = "\n"
-    args_head = lit("Args:")
+    args_head = lit("Args:") | lit("Parameters:")
     arg_type = reg(r"[^)]+")
     arg_doc = optional_whitespace >> reg(r".*") & rep("\n" >> double_indent >> reg(r".*"))
     # TODO(SigureMo): Deal *args and **kwargs
diff --git a/src/dokyu/schema/docstring.py b/src/dokyu/schema/docstring.py
index 211ced4..9d8fd04 100644
--- a/src/dokyu/schema/docstring.py
+++ b/src/dokyu/schema/docstring.py
@@ -6,4 +6,5 @@
 class Argument(BaseModel):
     name: str
     type: Optional[str]
+    is_optional: bool
     description: str
diff --git a/tests/test_parser/test_docstring/test_arg.py b/tests/test_parser/test_docstring/test_arg.py
index 0c873e8..44ce71f 100644
--- a/tests/test_parser/test_docstring/test_arg.py
+++ b/tests/test_parser/test_docstring/test_arg.py
@@ -42,10 +42,11 @@ def test_parse_arg_type(arg_type_string: str):
     arg_2 (list[int|tuple[int, ...]] | tuple[int, ...]): Arg 2 is a list of integers.
 """,
             [
-                Argument(name="arg_1", type="int", description="Arg 1 is an integer."),
+                Argument(name="arg_1", type="int", is_optional=False, description="Arg 1 is an integer."),
                 Argument(
                     name="arg_2",
                     type="list[int|tuple[int, ...]] | tuple[int, ...]",
+                    is_optional=False,
                     description="Arg 2 is a list of integers.",
                 ),
             ],
@@ -57,7 +58,7 @@ def test_parse_arg_type(arg_type_string: str):
     arg_1 (int): Arg 1 is an integer.
 """,
             [
-                Argument(name="arg_1", type="int", description="Arg 1 is an integer."),
+                Argument(name="arg_1", type="int", is_optional=False, description="Arg 1 is an integer."),
             ],
         ),
         (
@@ -71,6 +72,7 @@ def test_parse_arg_type(arg_type_string: str):
                 Argument(
                     name="arg_1",
                     type="np.ndarray[int] | int",
+                    is_optional=False,
                     description="Arg 1 is an integer. This line is too long and will be wrapped with next line. and next line.",
                 ),
             ],
@@ -89,15 +91,26 @@ def test_parse_arg_type(arg_type_string: str):
                 Argument(
                     name="arg_1",
                     type="np.ndarray[int] | int",
+                    is_optional=False,
                     description="Arg 1 is an integer. This line is too long and will be wrapped with next line. and next line.",
                 ),
                 Argument(
                     name="arg_2",
                     type="np.ndarray[int] | int",
+                    is_optional=False,
                     description="Arg 1 is an integer. This line is too long and will be wrapped with next line. and next line.",
                 ),
             ],
         ),
+        (
+            """\
+Parameters:
+    arg_1 (int, optional): Arg 1 is an integer.
+""",
+            [
+                Argument(name="arg_1", type="int", is_optional=True, description="Arg 1 is an integer."),
+            ],
+        ),
     ],
 )
 def test_parse_args(args_string: str, expected: list[Argument]):