diff --git a/mission/chapter03/mission.md b/mission/chapter03/mission.md
new file mode 100644
index 0000000..11887d8
--- /dev/null
+++ b/mission/chapter03/mission.md
@@ -0,0 +1,61 @@
+1. 회원 가입 API
+   - Endpoint: POST /api/users
+   - Request Body:
+     ```json
+     {
+     	"username": "string",
+     	"email": "string",
+     	"password": "string"
+     }
+     ```
+   - Response: 201 Created
+2. 미션 목록 조회 (홈)
+   - Endpoint: GET /api/missions
+   - Query Parameters:
+     - status: "ongoing" | "completed"
+   - Request Header:
+     - Authorization: Bearer {token}
+   - Response: 200 OK
+3. 미션 성공 누르기 API
+   - Endpoint: PUT /api/missions/{mission_id}/complete
+   - Path Variable: mission_id
+   - Request Header:
+     - Authorization: Bearer {token}
+   - Response: 200 OK
+4. 마이 페이지 정보 조회 API (토큰으로 구별)
+   - Endpoint: GET /api/users/my
+   - Request Header:
+     - Authorization: Bearer {token}
+   - Response: 200 OK
+5. 리뷰 작성 API
+   - Endpoint: POST /api/reviews
+   - Request Header:
+     - Authorization: Bearer {token}
+   - Request Body:
+     ```json
+     {
+     	"mission_id": "integer",
+     	"store_id": "integer",
+     	"rating": "integer",
+     	"review_text": "string"
+     }
+     ```
+   - Response: 201 Created
+6. 사용자 포인트 조회 API
+   - Endpoint: GET /api/users/my/points
+   - Request Header:
+     - Authorization: Bearer {token}
+   - Response: 200 OK
+7. 지역별 미션 목록 조회 API
+   - Endpoint: GET /api/missions/regions/{region_id}
+   - Path Variable: region_id
+   - Query Parameters:
+     - status: "ongoing" | "completed"
+   - Request Header:
+     - Authorization: Bearer {token}
+   - Response: 200 OK
+8. 사용자 알림 조회 API
+   - Endpoint: GET /api/users/my/notifications
+   - Request Header:
+     - Authorization: Bearer {token}
+   - Response: 200 OK