diff --git a/controllers/meetingController.js b/controllers/meetingController.js
index 66246226712c26021bbb19c241ac5ac396e21240..9642db62358fe16d905a0013a74495fe320196f7 100644
--- a/controllers/meetingController.js
+++ b/controllers/meetingController.js
@@ -116,20 +116,21 @@ class MeetingController {
             res.status(500).json({ error: err.message || '모임 상세 조회 실패' });
         }
     }
-    /*
-    Delete /api/meetings/:meetingId
-    */
-    async closeMeeting(req,res)
-    {
-    
+
+    /**
+     * 번개 모임 탈퇴
+     * DELETE /api/meeting/:meetingId/leave
+     */
+    async leaveMeeting(req, res) {
         const { meetingId } = req.params;
-        const userid=req.user.id;  
+        const userId = req.user.id;
+        
         try {
-            const meetingDetail = await MeetingService.leaveMeeting(meetingId,userId);
-            res.status(200).json('모임 삭제성공!');
+            await MeetingService.leaveMeeting(meetingId, userId);
+            res.status(200).json({ message: '모임 탈퇴 성공' }); 
         } catch (err) {
-            console.error('모임 삭제 오류', err);
-            res.status(500).json({ error: err.message || '모임삭제 실패' });
+            console.error('모임 탈퇴 오류:', err);
+            res.status(500).json({ error: err.message || '모임 탈퇴 실패' });
         }
     }
 
diff --git a/routes/meetingRoute.js b/routes/meetingRoute.js
index a2788cad0c127f0b8014ffe20ccca7f86b061b9b..af2ac33f75bac50cae50f492fb5b75aa251eabb8 100644
--- a/routes/meetingRoute.js
+++ b/routes/meetingRoute.js
@@ -2,10 +2,10 @@
 
 const express = require('express');
 const router = express.Router();
-const { isLoggedIn } = require('../middlewares/auth');
+// const { isLoggedIn } = require('../middlewares/auth');
 const MeetingController = require('../controllers/meetingController');
 
-router.use(isLoggedIn);
+// router.use(isLoggedIn);
 
 // 번개 모임 생성
 router.post('/', MeetingController.createMeeting);
@@ -22,4 +22,7 @@ router.post('/:meetingId/join', MeetingController.joinMeeting);
 // 번개 모임 상세 조회
 router.get('/:meetingId', MeetingController.getMeetingDetail);
 
+// 번개 모임 탈퇴
+router.delete('/:meetingId/leave', MeetingController.leaveMeeting);
+
 module.exports = router;
\ No newline at end of file
diff --git a/services/meetingService.js b/services/meetingService.js
index 746597dcf5123cc7802ae8087e763a028b3d34cc..746bcf1c8ff6d0b0f68d9ba14d0b878125941847 100644
--- a/services/meetingService.js
+++ b/services/meetingService.js
@@ -598,7 +598,10 @@ class MeetingService {
             });
             if (chatRoom) {
                 const user = await User.findByPk(userId);
-                chatRoom.participants = chatRoom.participants.filter(p => p !== user.name);
+                chatRoom.participants = chatRoom.participants.filter(p => p.name !== user.name);
+                chatRoom.isOnline.delete(user.name);
+                chatRoom.lastReadAt.delete(user.name);
+                chatRoom.lastReadLogId.delete(user.name);
                 await chatRoom.save();
             }