diff --git a/src/pages/Chat.tsx b/src/pages/Chat.tsx
index 1a13a45..a7d6b61 100644
--- a/src/pages/Chat.tsx
+++ b/src/pages/Chat.tsx
@@ -119,9 +119,19 @@ const Chat = () => {
         wsMessage.nickname &&
         wsMessage.message
       ) {
-        // 일반 채팅 메시지 처리
+        // 자신이 보낸 메시지는 이미 화면에 추가했으므로 무시
+        if (wsMessage.nickname === nickname) {
+          return;
+        }
+
+        // 다른 사용자의 메시지만 화면에 추가
+        console.log(
+          "다른 사용자 메시지 추가:",
+          wsMessage.nickname,
+          wsMessage.message
+        );
         const newMessage: Message = {
-          role: wsMessage.nickname === nickname ? "user" : "assistant",
+          role: "assistant",
           content: wsMessage.message,
           nickname: wsMessage.nickname,
           mbti: wsMessage.mbti || undefined,
diff --git a/src/services/websocket.ts b/src/services/websocket.ts
index d1ccd63..a1781ed 100644
--- a/src/services/websocket.ts
+++ b/src/services/websocket.ts
@@ -48,6 +48,11 @@ export class OpenChatWebSocket {
         };
 
         this.ws.onclose = (event) => {
+          console.warn("WebSocket 연결 종료:", {
+            code: event.code,
+            reason: event.reason,
+            wasClean: event.wasClean
+          });
           this.notifyConnectionHandlers(false);
 
           if (!event.wasClean && this.shouldReconnect()) {
@@ -81,10 +86,14 @@ export class OpenChatWebSocket {
 
   sendMessage(content: string) {
     if (!this.ws || this.ws.readyState !== WebSocket.OPEN) {
+      console.error("WebSocket 연결 안됨:", {
+        readyState: this.ws?.readyState
+      });
       throw new Error("WebSocket is not connected");
     }
 
     if (!this.config) {
+      console.error("WebSocket config 없음");
       throw new Error("WebSocket config is not set");
     }