diff --git a/src/controllers/task.controller.js b/src/controllers/task.controller.js
index 67a0fa9..e6b7e85 100644
--- a/src/controllers/task.controller.js
+++ b/src/controllers/task.controller.js
@@ -5,7 +5,23 @@ import { taskDetailResponseDTO } from "../dtos/task.dto.js";
 import { taskListResponseDTO } from "../dtos/task.dto.js";
 
 class TaskController {
-  // 과제 생성
+  // 완료된 과제 조회
+  async getCompletedTasks(req, res, next) {
+    try {
+      const userId = req.user.id; 
+      
+      const result = await taskService.getCompletedTasks(userId);
+
+      res.status(200).json({
+        resultType: "SUCCESS",
+        message: "완료된 과제 조회에 성공하였습니다.",
+        data: result
+      });
+    } catch (error) {
+      next(error);
+    }
+  }
+
   async createTask(req, res, next) {
     try {
       const taskRequest = createTaskRequestDTO(req.body);
@@ -242,4 +258,6 @@ class TaskController {
   }
 }
 
+
+
 export default new TaskController();
diff --git a/src/dtos/task.dto.js b/src/dtos/task.dto.js
index 6c8aabc..cea44cb 100644
--- a/src/dtos/task.dto.js
+++ b/src/dtos/task.dto.js
@@ -92,4 +92,22 @@ export const taskListResponseDTO = (tasks) => {
             progressRate: task.progressRate // 서비스에서 계산된 값 사용
         };
     });
+};
+
+export const responseFromCompletedTasks = (tasks) => {
+  return {
+    tasks: tasks.map((task) => ({
+      taskId: task.id,
+      title: task.title,
+      deadline: task.deadline ? new Date(task.deadline).toISOString().split('T')[0] : null,
+      
+      type: task.type === "TEAM" ? "팀" : "개인", 
+      
+      status: task.status === 'COMPLETED' ? '완료' : task.status,
+      
+      folderId: task.folder ? task.folder.id : null,
+      folderTitle: task.folder ? task.folder.folderTitle : null,
+      color: task.folder ? task.folder.color : null,
+    })),
+  };
 };
\ No newline at end of file
diff --git a/src/repositories/task.repository.js b/src/repositories/task.repository.js
index 222857e..01dd4f2 100644
--- a/src/repositories/task.repository.js
+++ b/src/repositories/task.repository.js
@@ -1,6 +1,24 @@
 import { prisma } from "../db.config.js";
 
 class TaskRepository {
+  async getCompletedTasks(userId) {
+    return await prisma.task.findMany({
+      where: {
+        folder: {
+          userId: userId,
+        },
+        
+        status: 'COMPLETED',
+      },
+      include: {
+        folder: true,
+      },
+      orderBy: {
+        deadline: 'asc',
+      },
+    });
+  }
+
   // 폴더 찾기
   async findFolderById(id) {
     return await prisma.folder.findUnique({ where: { id } });
diff --git a/src/routes/task.route.js b/src/routes/task.route.js
index cc6237f..d370779 100644
--- a/src/routes/task.route.js
+++ b/src/routes/task.route.js
@@ -1,9 +1,12 @@
 import express from "express";
 import taskController from "../controllers/task.controller.js";
-import authenticate from '../middlewares/authenticate.middleware.js';
+import authenticate from "../middlewares/authenticate.middleware.js";
 
 const router = express.Router();
 
+// 완료된 과제
+router.get("/completed", authenticate, taskController.getCompletedTasks);
+
 // POST /api/v1/task -- 과제 생성
 router.post("/", authenticate, taskController.createTask);
 
@@ -29,6 +32,7 @@ router.patch("/:taskId/member/:memberId", authenticate, taskController.updateTea
 // 세부 TASK 상태 업데이트
 router.patch(
   '/subtask/:subTaskId/status',
+  authenticate,
   taskController.updateSubTaskStatus
 );
 
diff --git a/src/services/task.service.js b/src/services/task.service.js
index 2e95e6c..cd3aa01 100644
--- a/src/services/task.service.js
+++ b/src/services/task.service.js
@@ -1,8 +1,21 @@
 import taskRepository from "../repositories/task.repository.js";
+import { getUserData } from "../repositories/user.repository.js"; 
+import { responseFromCompletedTasks } from "../dtos/task.dto.js";
 import { BadRequestError, NotFoundError } from "../errors/custom.error.js";
 import { prisma } from "../db.config.js";
 
 class TaskService {
+  async getCompletedTasks(userId) {
+    const user = await getUserData(userId);
+    if (!user) {
+      throw new NotFoundError("USER_NOT_FOUND", "해당 사용자를 찾을 수 없습니다.");
+    }
+
+    const tasks = await taskRepository.getCompletedTasks(userId);
+
+    return responseFromCompletedTasks(tasks);
+  }
+  
   // 과제 등록
   async registerTask(data) {
     const { subTasks, references, folderId, ...taskData } = data;