diff --git a/src/main/java/shop/geeksasang/config/exception/response/BaseResponseStatus.java b/src/main/java/shop/geeksasang/config/exception/response/BaseResponseStatus.java
index 0259f705..f3621a2d 100644
--- a/src/main/java/shop/geeksasang/config/exception/response/BaseResponseStatus.java
+++ b/src/main/java/shop/geeksasang/config/exception/response/BaseResponseStatus.java
@@ -83,6 +83,7 @@ public enum BaseResponseStatus {
     NOT_EXIST_CHAT_ROOM_CHIEF(false,2024,"배달 파티 채팅방 방장이 존재하지 않습니다."),
     NOT_CHAT_ROOM_CHIEF(false,2025,"배달 파티 채팅방 방장이 아닙니다."),
     CANT_REMOVE_REMIT_MEMBER(false,2026,"송금을 완료한 멤버는 방에서 퇴장시킬 수 없습니다."),
+    ALREADY_PARTY_FINISH(false, 2027 , "이미 마감한 파티입니다."),
 
 
 
diff --git a/src/main/java/shop/geeksasang/dto/chat/partychatroom/GetPartyChatRoomDetailRes.java b/src/main/java/shop/geeksasang/dto/chat/partychatroom/GetPartyChatRoomDetailRes.java
index 30422211..ca8da396 100644
--- a/src/main/java/shop/geeksasang/dto/chat/partychatroom/GetPartyChatRoomDetailRes.java
+++ b/src/main/java/shop/geeksasang/dto/chat/partychatroom/GetPartyChatRoomDetailRes.java
@@ -35,9 +35,15 @@ public class GetPartyChatRoomDetailRes {
     @ApiModelProperty(example = "88", value = "채팅방 방장 id")
     private int chiefId;
 
+    @ApiModelProperty(example = "34", value = "채팅방 id")
+    private int partyId;
+
+    @ApiModelProperty(example = "true", value = "배달 파티 매칭 완료 여부")
+    private Boolean isMatchingFinish;
 
     @Builder
-    public GetPartyChatRoomDetailRes(Boolean isRemittanceFinish, Boolean isChief, Boolean isOrderFinish, String accountNumber, String bank, LocalDateTime enterTime, int chiefId) {
+    public GetPartyChatRoomDetailRes(Boolean isRemittanceFinish, Boolean isChief, Boolean isOrderFinish, String accountNumber, String bank, LocalDateTime enterTime,
+                                     int chiefId, int partyId, boolean isMatchingFinish) {
         this.isRemittanceFinish = isRemittanceFinish;
         this.isChief = isChief;
         this.isOrderFinish = isOrderFinish;
@@ -45,6 +51,8 @@ public GetPartyChatRoomDetailRes(Boolean isRemittanceFinish, Boolean isChief, Bo
         this.bank = bank;
         this.enterTime = enterTime;
         this.chiefId = chiefId;
+        this.partyId = partyId;
+        this.isMatchingFinish = isMatchingFinish;
     }
 
     public static GetPartyChatRoomDetailRes toDto(PartyChatRoom partyChatRoom, PartyChatRoomMember partyChatRoomMember,Boolean isChief,Boolean isOrderFinish){
@@ -56,6 +64,8 @@ public static GetPartyChatRoomDetailRes toDto(PartyChatRoom partyChatRoom, Party
                 .bank(partyChatRoom.getBank())
                 .enterTime(partyChatRoomMember.getEnterTime())
                 .chiefId(partyChatRoom.getChief().getMemberId())
+                .partyId(partyChatRoom.getDeliveryPartyId())
+                .isMatchingFinish(partyChatRoom.getIsFinish())
                 .build();
     }
 }
diff --git a/src/main/java/shop/geeksasang/service/chat/DeliveryPartyChatService.java b/src/main/java/shop/geeksasang/service/chat/DeliveryPartyChatService.java
index 692a8888..58e356e1 100644
--- a/src/main/java/shop/geeksasang/service/chat/DeliveryPartyChatService.java
+++ b/src/main/java/shop/geeksasang/service/chat/DeliveryPartyChatService.java
@@ -195,12 +195,16 @@ public PartyChatRoomMemberRes joinPartyChatRoom(int memberId, String chatRoomId,
         Member member = memberRepository.findMemberById(memberId)
                 .orElseThrow(() -> new BaseException(NOT_EXIST_USER));
 
-        String email = member.getEmail().getAddress();
         String profileImgUrl = member.getProfileImgUrl();
 
         PartyChatRoom partyChatRoom = partyChatRoomRepository.findByPartyChatRoomId(new ObjectId(chatRoomId))
                 .orElseThrow(() -> new BaseException(NOT_EXISTS_CHAT_ROOM));
 
+        //이미 마감했는지
+        if(partyChatRoom.getIsFinish()){
+            throw new BaseException(ALREADY_PARTY_FINISH);
+        }
+
         //Validation 기존의 멤버인지 예외 처리
         if (partyChatRoom.getParticipants().stream().anyMatch(participant -> participant.getMemberId() == memberId)) {
             throw new BaseException(ALREADY_PARTICIPATE_CHATROOM);
diff --git a/src/main/java/shop/geeksasang/service/deliveryparty/DeliveryPartyService.java b/src/main/java/shop/geeksasang/service/deliveryparty/DeliveryPartyService.java
index b87cb0d4..49685220 100644
--- a/src/main/java/shop/geeksasang/service/deliveryparty/DeliveryPartyService.java
+++ b/src/main/java/shop/geeksasang/service/deliveryparty/DeliveryPartyService.java
@@ -1,6 +1,7 @@
 package shop.geeksasang.service.deliveryparty;
 
 import lombok.RequiredArgsConstructor;
+import org.bson.types.ObjectId;
 import org.springframework.data.domain.PageRequest;
 import org.springframework.data.domain.Sort;
 import org.springframework.stereotype.Service;
@@ -312,10 +313,17 @@ public PatchLeaveChiefRes chiefLeaveDeliveryParty(String uuid, String nickName,
     @Transactional(readOnly = false)
     public PatchDeliveryPartyMatchingStatusRes patchDeliveryPartyMatchingStatus(Integer partyId, int userId) {
 
+        //여기서 방장 인증을 진행함.
         DeliveryParty deliveryParty = deliveryPartyRepository.findDeliveryPartyByIdAndUserIdAndMatchingStatus(partyId, userId).
                 orElseThrow(() -> new BaseException(BaseResponseStatus.CAN_NOT_FINISH_DELIVERY_PARTY));
-
         deliveryParty.changeMatchingStatusToFinish();
+
+        //그러므로 여기서 방장 인증을 진행할 필요가 없음.
+        PartyChatRoom partyChatRoom = partyChatRoomRepository.findByDeliveryPartyId(partyId)
+                .orElseThrow(() -> new BaseException(NOT_EXISTS_CHAT_ROOM));
+
+        partyChatRoomRepository.changeIsFinish(new ObjectId(partyChatRoom.getId()));
+
         return PatchDeliveryPartyMatchingStatusRes.builder()
                 .deliveryPartyId(deliveryParty.getId())
                 .matchingStatus(deliveryParty.getMatchingStatus().toString())