diff --git a/ClientTester/EchoClientTester/Packet/PacketBody.cs b/ClientTester/EchoClientTester/Packet/PacketBody.cs
index 1ed7191..65b5bd6 100644
--- a/ClientTester/EchoClientTester/Packet/PacketBody.cs
+++ b/ClientTester/EchoClientTester/Packet/PacketBody.cs
@@ -210,6 +210,32 @@ public class LoadChannelPacket
     } = new List<ChannelInfo>();
 }
 
+// 채널 내 파티 정보 (INTO_CHANNEL 응답에 포함)
+[ProtoContract]
+public class PartyInfoData
+{
+    [ProtoMember(1)]
+    public int PartyId
+    {
+        get;
+        set;
+    }
+
+    [ProtoMember(2)]
+    public int LeaderId
+    {
+        get;
+        set;
+    }
+
+    [ProtoMember(3)]
+    public List<int> MemberPlayerIds
+    {
+        get;
+        set;
+    } = new List<int>();
+}
+
 // INTO_CHANNEL 클라->서버: 입장할 채널 ID / 서버->클라: 채널 내 나 이외 플레이어 목록
 [ProtoContract]
 public class IntoChannelPacket
@@ -227,6 +253,13 @@ public class IntoChannelPacket
         get;
         set;
     } = new List<PlayerInfo>(); // 서버->클라: 채널 내 플레이어 목록
+
+    [ProtoMember(3)]
+    public List<PartyInfoData> Parties
+    {
+        get;
+        set;
+    } = new List<PartyInfoData>(); // 서버->클라: 채널 내 파티 목록
 }
 
 // UPDATE_CHANNEL_USER 유저 접속/나감
diff --git a/MMOTestServer/MMOserver/Game/GameServer.cs b/MMOTestServer/MMOserver/Game/GameServer.cs
index c05c3e6..902a546 100644
--- a/MMOTestServer/MMOserver/Game/GameServer.cs
+++ b/MMOTestServer/MMOserver/Game/GameServer.cs
@@ -584,6 +584,28 @@ public class GameServer : ServerBase
                 BroadcastToUsers(party.PartyMemberIds, data); // 전원 (리더 포함)
                 break;
             }
+            case PartyUpdateType.UPDATE:
+            {
+                if (!pm.UpdateParty(hashKey, req.PartyId, out PartyInfo? party))
+                {
+                    SendError(peer, ErrorCode.PARTY_UPDATE_FAILED);
+                    return;
+                }
+
+                UpdatePartyPacket notify = new UpdatePartyPacket
+                {
+                    PartyId = req.PartyId,
+                    Type = PartyUpdateType.LEAVE,
+                    LeaderId = party?.LeaderId ?? 0,
+                    PlayerId = hashKey,
+                };
+                byte[] data = PacketSerializer.Serialize<UpdatePartyPacket>((ushort)PacketCode.UPDATE_PARTY, notify);
+                if (party != null)
+                {
+                    BroadcastToUsers(party.PartyMemberIds, data); // 남은 멤버들에게
+                }
+                break;
+            }
         }
     }
 
diff --git a/MMOTestServer/MMOserver/Game/Party/PartyManager.cs b/MMOTestServer/MMOserver/Game/Party/PartyManager.cs
index 39b97cd..430a59b 100644
--- a/MMOTestServer/MMOserver/Game/Party/PartyManager.cs
+++ b/MMOTestServer/MMOserver/Game/Party/PartyManager.cs
@@ -119,6 +119,27 @@ public class PartyManager
         return true;
     }
 
+    // 파티 업데이트
+    public bool UpdateParty(int leaderId, int partyId, out PartyInfo? party)
+    {
+        party = null;
+
+        if (!parties.TryGetValue(partyId, out party))
+        {
+            return false;
+        }
+
+        if (party.LeaderId != leaderId)
+        {
+            party = null;
+            return false; // 리더만 업데이트 가능
+        }
+
+        // 파티 이름 변경
+        party.PartyName = party.PartyName;
+        return true;
+    }
+
     // 전체 파티 목록 조회
     public IEnumerable<PartyInfo> GetAllParties()
     {
diff --git a/MMOTestServer/MMOserver/Packet/PacketBody.cs b/MMOTestServer/MMOserver/Packet/PacketBody.cs
index db2dc23..76f28a2 100644
--- a/MMOTestServer/MMOserver/Packet/PacketBody.cs
+++ b/MMOTestServer/MMOserver/Packet/PacketBody.cs
@@ -560,6 +560,7 @@ public enum ErrorCode : int
     PARTY_JOIN_FAILED      = 10022,
     PARTY_NOT_IN_PARTY     = 10023,
     PARTY_DELETE_FAILED    = 10024,
+    PARTY_UPDATE_FAILED    = 10025,
 }
 
 // ERROR (서버 -> 클라)
@@ -583,7 +584,8 @@ public enum PartyUpdateType
     CREATE,
     DELETE,
     JOIN,
-    LEAVE
+    LEAVE,
+    UPDATE
 }
 
 // REQUEST_PARTY (클라 -> 서버) - CREATE: PartyName 사용 / JOIN·LEAVE·DELETE: PartyId 사용