diff --git a/src/game/input.h b/src/game/input.h
index 6980b2c..f0ca4f7 100644
--- a/src/game/input.h
+++ b/src/game/input.h
@@ -132,6 +132,7 @@ class CInputMain : public CInputProcessor
 
 		void		QuestInputString(LPCHARACTER ch, const void * pvData);
 		void		QuestConfirm(LPCHARACTER ch, const void* pvData);
+		void		QuestCancel(LPCHARACTER ch);
 		void		Target(LPCHARACTER ch, const char * pcData);
 		void		Warp(LPCHARACTER ch, const char * pcData);
 		void		SafeboxCheckin(LPCHARACTER ch, const char * c_pData);
diff --git a/src/game/input_main.cpp b/src/game/input_main.cpp
index 6942fbc..53add09 100644
--- a/src/game/input_main.cpp
+++ b/src/game/input_main.cpp
@@ -2056,6 +2056,12 @@ void CInputMain::QuestConfirm(LPCHARACTER ch, const void* c_pData)
 	}
 }
 
+void CInputMain::QuestCancel(LPCHARACTER ch)
+{
+	sys_log(0, "QuestCancel from %s pid %u", ch->GetName(), ch->GetPlayerID());
+	quest::CQuestManager::Instance().Cancel(ch->GetPlayerID());
+}
+
 void CInputMain::Target(LPCHARACTER ch, const char * pcData)
 {
 	TPacketCGTarget * p = (TPacketCGTarget *) pcData;
@@ -3272,6 +3278,10 @@ int CInputMain::Analyze(LPDESC d, BYTE bHeader, const char * c_pData)
 			QuestConfirm(ch, c_pData);
 			break;
 
+		case HEADER_CG_QUEST_CANCEL:
+			QuestCancel(ch);
+			break;
+
 		case HEADER_CG_TARGET:
 			Target(ch, c_pData);
 			break;
diff --git a/src/game/packet.h b/src/game/packet.h
index 85bcf56..6b8b766 100644
--- a/src/game/packet.h
+++ b/src/game/packet.h
@@ -34,6 +34,7 @@ enum
 	HEADER_CG_SCRIPT_ANSWER			= 29,
 	HEADER_CG_QUEST_INPUT_STRING		= 30,
 	HEADER_CG_QUEST_CONFIRM			= 31,
+	HEADER_CG_QUEST_CANCEL			= 32,
 
 	HEADER_CG_SHOP				= 50,
 	HEADER_CG_FLY_TARGETING			= 51,
@@ -806,6 +807,11 @@ typedef struct command_quest_confirm
 	uint32_t requestPID;
 } TPacketCGQuestConfirm;
 
+typedef struct command_quest_cancel
+{
+	uint8_t header;
+} TPacketCGQuestCancel;
+
 /*
  * 서버 측에서 보내는 패킷 
  */
diff --git a/src/game/packet_info.cpp b/src/game/packet_info.cpp
index b7fa9a1..1fcae85 100644
--- a/src/game/packet_info.cpp
+++ b/src/game/packet_info.cpp
@@ -174,6 +174,7 @@ CPacketInfoCG::CPacketInfoCG()
 	Set(HEADER_CG_SCRIPT_BUTTON, sizeof(TPacketCGScriptButton), "ScriptButton", true);
 	Set(HEADER_CG_QUEST_INPUT_STRING, sizeof(TPacketCGQuestInputString), "QuestInputString", true);
 	Set(HEADER_CG_QUEST_CONFIRM, sizeof(TPacketCGQuestConfirm), "QuestConfirm", true);
+	Set(HEADER_CG_QUEST_CANCEL, sizeof(TPacketCGQuestCancel), "QuestCancel", true);
 
 	Set(HEADER_CG_MOVE, sizeof(TPacketCGMove), "Move", true);
 	Set(HEADER_CG_SYNC_POSITION, sizeof(TPacketCGSyncPosition), "SyncPosition", true);
diff --git a/src/game/questmanager.cpp b/src/game/questmanager.cpp
index b9a0bff..95ba973 100644
--- a/src/game/questmanager.cpp
+++ b/src/game/questmanager.cpp
@@ -381,6 +381,23 @@ namespace quest
 		}
 	}
 
+	void CQuestManager::Cancel(unsigned int pc)
+	{
+		PC * pPC = GetPC(pc);
+
+		if (pPC && pPC->IsRunning())
+		{
+			sys_log(0, "QUEST: Dialog cancelled by player %u, cleaning up quest state (quest: %s)", pc, pPC->GetCurrentQuestName().c_str());
+			
+			CloseState(*pPC->GetRunningQuestState());
+			pPC->CancelRunning();
+		}
+		else
+		{
+			sys_log(0, "QUEST: Cancel requested for player %u but no quest is running", pc);
+		}
+	}
+
 	///////////////////////////////////////////////////////////////////////////////////////////
 	//
 	// Quest Event 관련
diff --git a/src/game/questmanager.h b/src/game/questmanager.h
index 3340dc0..ebef9ea 100644
--- a/src/game/questmanager.h
+++ b/src/game/questmanager.h
@@ -114,6 +114,7 @@ namespace quest
 			void		SelectItem(unsigned int pc, unsigned int selection);
 
 			void		LogoutPC(LPCHARACTER ch);
+			void		Cancel(unsigned int pc);
 			void		DisconnectPC(LPCHARACTER ch);
 
 			QuestState *	GetCurrentState()	{ return m_CurrentRunningState; }