diff --git a/server/imserver/chatmgr.cc b/server/imserver/chatmgr.cc
index 25736c3..5eef82a 100644
--- a/server/imserver/chatmgr.cc
+++ b/server/imserver/chatmgr.cc
@@ -1,5 +1,7 @@
 #include "precompile.h"
 
+#include <a8/timer.h>
+
 #include "chatmgr.h"
 #include "player.h"
 #include "playermgr.h"
@@ -15,6 +17,14 @@ struct ChatedUserRec
     std::map<std::string, ChatMsgRec> users;
 };
 
+ChatMsgRec::~ChatMsgRec()
+{
+    for (cs::MFChatMsg* msg : msg_list) {
+        delete msg;
+    }
+    msg_list.clear();
+}
+
 void ChatMsgRec::Pop(size_t max_num)
 {
     while (msg_list.size() > max_num) {
@@ -307,7 +317,16 @@ void ChatMgr::OnPlayerOnline(Player* hum)
 
 void ChatMgr::OnPlayerOffline(Player* hum)
 {
-
+    a8::Timer::Instance()->AddDeadLineTimer
+        (1000 * 60 * 5,
+         a8::XParams()
+         .SetSender(hum->AccountId()),
+         [] (const a8::XParams& param)
+         {
+             if (!PlayerMgr::Instance()->GetPlayerByAccountId(param.sender)) {
+                 ChatMgr::Instance()->RemoveChatedUser(param.sender);
+             }
+         });
 }
 
 void ChatMgr::AddChatedUser(const std::string& sender_id, const std::string& receiver_id,
@@ -349,3 +368,12 @@ void ChatMgr::FillMFChatMsg(cs::MFChatMsg* msg, Player* sender, long long msg_uu
     msg->set_msg_body(msg_body);
     msg->set_send_time(time(nullptr));
 }
+
+void ChatMgr::RemoveChatedUser(const std::string& account_id)
+{
+    auto itr = private_chated_users_.find(account_id);
+    if (itr != private_chated_users_.end()) {
+        delete itr->second;
+        private_chated_users_.erase(account_id);
+    }
+}
diff --git a/server/imserver/chatmgr.h b/server/imserver/chatmgr.h
index e0be2ba..5ad595e 100644
--- a/server/imserver/chatmgr.h
+++ b/server/imserver/chatmgr.h
@@ -4,11 +4,11 @@
 
 struct ChatMsgRec
 {
-
     long long curr_id = 0;
     long long last_id = 0;
     std::list<cs::MFChatMsg*> msg_list;
 
+    ~ChatMsgRec();
     void Pop(size_t max_num);
     void PopAndDelete(size_t max_num);
 };
@@ -48,6 +48,7 @@ class ChatMgr : public a8::Singleton<ChatMgr>
                        cs::MFChatMsg* chat_msg, long long last_id);
     void FillMFChatMsg(cs::MFChatMsg* msg, Player* sender, long long msg_uuid,
                        int chat_channel, int msg_type, const std::string& msg_body);
+    void RemoveChatedUser(const std::string& account_id);
 
  private:
     long long world_msg_id_ = 1000;