diff --git a/wshandler/api_handler.go b/wshandler/api_handler.go
index 9b8e17b..0de56f6 100644
--- a/wshandler/api_handler.go
+++ b/wshandler/api_handler.go
@@ -18,11 +18,12 @@ const (
 
 type apiFuncType func(ApiCallContext)
 type connFuncType func(*websocket.Conn, *Sender)
+type disconnFuncType func(string, *Sender)
 
 type WebsocketApiHandler struct {
 	methods              map[string]apiFuncType
 	connfunc             connFuncType
-	disconnfunc          connFuncType
+	disconnfunc          disconnFuncType
 	originalReceiverName string
 }
 
@@ -40,7 +41,7 @@ func MakeWebsocketApiHandler[T any](receiver *T, receiverName string) WebsocketA
 	}
 
 	var connfunc connFuncType
-	var disconnfunc connFuncType
+	var disconnfunc disconnFuncType
 
 	for i := 0; i < tp.NumMethod(); i++ {
 		method := tp.Method(i)
@@ -70,7 +71,7 @@ func MakeWebsocketApiHandler[T any](receiver *T, receiverName string) WebsocketA
 			if method.Type.NumIn() != 3 {
 				continue
 			}
-			if method.Type.In(1) != reflect.TypeOf((*websocket.Conn)(nil)) {
+			if method.Type.In(1) != reflect.TypeOf("") {
 				continue
 			}
 			if method.Type.In(2) != reflect.TypeOf((*Sender)(nil)) {
@@ -79,10 +80,10 @@ func MakeWebsocketApiHandler[T any](receiver *T, receiverName string) WebsocketA
 			funcptr := method.Func.Pointer()
 			p1 := unsafe.Pointer(&funcptr)
 			p2 := unsafe.Pointer(&p1)
-			disconnfuncptr := (*func(*T, *websocket.Conn, *Sender))(p2)
+			disconnfuncptr := (*func(*T, string, *Sender))(p2)
 
-			disconnfunc = func(c *websocket.Conn, s *Sender) {
-				(*disconnfuncptr)(receiver, c, s)
+			disconnfunc = func(msg string, s *Sender) {
+				(*disconnfuncptr)(receiver, msg, s)
 			}
 		} else {
 			if method.Type.NumIn() != 2 {
@@ -114,7 +115,7 @@ type WebsocketApiBroker struct {
 	methods      map[string]apiFuncType
 	methods_dup  map[string][]apiFuncType
 	connFuncs    []connFuncType
-	disconnFuncs []connFuncType
+	disconnFuncs []disconnFuncType
 }
 
 func (hc *WebsocketApiBroker) AddHandler(receiver WebsocketApiHandler) {
@@ -148,7 +149,7 @@ func (hc *WebsocketApiBroker) AddHandler(receiver WebsocketApiHandler) {
 	if receiver.disconnfunc != nil {
 		// disconnfunc은 역순
 		logger.Printf("ws api registered : %s.ClientDisconnected\n", receiver.originalReceiverName)
-		hc.disconnFuncs = append([]connFuncType{receiver.disconnfunc}, hc.disconnFuncs...)
+		hc.disconnFuncs = append([]disconnFuncType{receiver.disconnfunc}, hc.disconnFuncs...)
 	}
 }
 
@@ -160,7 +161,7 @@ func (hc *WebsocketApiBroker) ClientConnected(c *wsconn) {
 
 func (hc *WebsocketApiBroker) ClientDisconnected(c *wsconn) {
 	for _, v := range hc.disconnFuncs {
-		v(c.Conn, c.sender)
+		v(c.closeMessage, c.sender)
 	}
 }
 
diff --git a/wshandler/wshandler.go b/wshandler/wshandler.go
index 6533878..fcaf7bd 100644
--- a/wshandler/wshandler.go
+++ b/wshandler/wshandler.go
@@ -29,7 +29,8 @@ var noAuthFlag = flagx.Bool("noauth", false, "")
 
 type wsconn struct {
 	*websocket.Conn
-	sender *Sender
+	sender       *Sender
+	closeMessage string
 }
 
 type UpstreamMessage struct {
@@ -455,11 +456,16 @@ func upgrade_core(ws *WebsocketHandler, conn *websocket.Conn, accid primitive.Ob
 		for {
 			messageType, r, err := c.NextReader()
 			if err != nil {
+				if ce, ok := err.(*websocket.CloseError); ok {
+					c.closeMessage = ce.Text
+				}
 				c.Close()
 				break
 			}
 
 			if messageType == websocket.CloseMessage {
+				closeMsg, _ := io.ReadAll(r)
+				logger.Println("close message :", string(closeMsg))
 				break
 			}