diff --git a/misskey/drive.py b/misskey/drive.py
index 08230d0..e45229c 100644
--- a/misskey/drive.py
+++ b/misskey/drive.py
@@ -7,6 +7,9 @@
     DriveFile,
     DriveFileSchema,
 )
+from .enum import (
+    DriveFilesSortEnum,
+)
 
 __all__ = (
     "Misskey",
@@ -24,7 +27,7 @@ def drive_files(
         until_id: Optional[str] = None,
         folder_id: Optional[str] = None,
         type: Optional[str] = None,
-        sort,  # TODO: Define enum
+        sort: Optional[DriveFilesSortEnum] = None,
     ) -> List[DriveFile]:
         # TODO
         raise NotImplementedError()
diff --git a/misskey/enum/__init__.py b/misskey/enum/__init__.py
index a96504f..483fe47 100644
--- a/misskey/enum/__init__.py
+++ b/misskey/enum/__init__.py
@@ -8,3 +8,4 @@
 from .reaction_acceptance import ReactionAcceptanceEnum
 from .http_method import HttpMethodEnum
 from .users import UsersSortEnum, UsersStateEnum, UsersOriginEnum
+from .drive_files_sort import DriveFilesSortEnum
diff --git a/misskey/enum/drive_files_sort.py b/misskey/enum/drive_files_sort.py
new file mode 100644
index 0000000..90434fd
--- /dev/null
+++ b/misskey/enum/drive_files_sort.py
@@ -0,0 +1,14 @@
+from enum import Enum
+
+__all__ = (
+    "DriveFilesSortEnum",
+)
+
+
+class DriveFilesSortEnum(Enum):
+    DESCENDING_CREATED_AT = "+createdAt"
+    ASCENDING_CREATED_AT = "-createdAt"
+    DESCENDING_NAME = "+name"
+    ASCENDING_NAME = "-name"
+    DESCENDING_SIZE = "+size"
+    ASCENDING_SIZE = "-size"