diff --git a/MMOTestServer/MMOserver/Game/GameServer.cs b/MMOTestServer/MMOserver/Game/GameServer.cs
index 26462b5..fa31520 100644
--- a/MMOTestServer/MMOserver/Game/GameServer.cs
+++ b/MMOTestServer/MMOserver/Game/GameServer.cs
@@ -299,6 +299,17 @@ public class GameServer : ServerBase
         IntoChannelPacket packet = Serializer.Deserialize<IntoChannelPacket>(new ReadOnlyMemory<byte>(payload));
 
         ChannelManager cm = ChannelManager.Instance;
+        Channel.Channel channel = cm.GetChannel(packet.ChannelId);
+
+        // 최대 인원 체크
+        if (channel.UserCount >= channel.UserCountMax)
+        {
+            Log.Warning("[GameServer] INTO_CHANNEL 채널 인원 초과 HashKey={Key} ChannelId={ChannelId} UserCount={Count}/{Max}",
+                hashKey, packet.ChannelId, channel.UserCount, channel.UserCountMax);
+            byte[] full = PacketSerializer.Serialize<IntoChannelPacket>((ushort)PacketCode.INTO_CHANNEL, new IntoChannelPacket { ChannelId = -1 });
+            SendTo(peer, full);
+            return;
+        }
 
         // TODO: 실제 서비스에서는 DB/세션에서 플레이어 정보 로드 필요
         Player newPlayer = new Player