diff --git a/src/main/java/team9502/sinchulgwinong/domain/chat/repository/ChatRoomRepository.java b/src/main/java/team9502/sinchulgwinong/domain/chat/repository/ChatRoomRepository.java
index 9e0dc8e..dd1b87a 100644
--- a/src/main/java/team9502/sinchulgwinong/domain/chat/repository/ChatRoomRepository.java
+++ b/src/main/java/team9502/sinchulgwinong/domain/chat/repository/ChatRoomRepository.java
@@ -10,4 +10,6 @@ public interface ChatRoomRepository extends JpaRepository<ChatRoom, Long> {
     List<ChatRoom> findByUser_UserId(Long userId);
 
     List<ChatRoom> findByCompanyUser_CpUserId(Long cpUserId);
+
+    boolean existsByUser_UserIdAndCompanyUser_CpUserId(Long userId, Long cpUserId);
 }
diff --git a/src/main/java/team9502/sinchulgwinong/domain/chat/service/ChatService.java b/src/main/java/team9502/sinchulgwinong/domain/chat/service/ChatService.java
index 7152576..c85d3cd 100644
--- a/src/main/java/team9502/sinchulgwinong/domain/chat/service/ChatService.java
+++ b/src/main/java/team9502/sinchulgwinong/domain/chat/service/ChatService.java
@@ -39,6 +39,10 @@ public ChatRoomResponseDTO createChatRoom(User user, Long cpUserId) {
         CompanyUser companyUser = companyUserRepository.findById(cpUserId)
                 .orElseThrow(() -> new ApiException(ErrorCode.COMPANY_USER_NOT_FOUND));
 
+        if(chatRoomRepository.existsByUser_UserIdAndCompanyUser_CpUserId(user.getUserId(),cpUserId)){
+            throw new ApiException(ErrorCode.ALREADY_CREATE_CHAT);
+        }
+
         ChatRoom chatRoom = new ChatRoom();
         chatRoom.setChatName(companyUser.getCpName());
         chatRoom.setUser(user);
@@ -63,7 +67,7 @@ public List<ChatRoomResponseDTO> getChatRooms(UserDetailsImpl userDetails) {
                     chatRooms = chatRoomRepository.findByUser_UserId(userDetails.getUserId());
                 }
                 break;
-            case "COMPANY_USER":
+            case "COMPANY":
                 if (userDetails.getCpUserId() != null) {
                     chatRooms = chatRoomRepository.findByCompanyUser_CpUserId(userDetails.getCpUserId());
                 }
@@ -96,7 +100,7 @@ public List<ChatMessageResponseDTO> getChatMessages(Long chatRoomId, UserDetails
                     chatRoom.setUserRead(false);
                 }
                 break;
-            case "COMPANY_USER":
+            case "COMPANY":
                 if (userDetails.getCpUserId() != null) {
                     chatRoom.setCompanyUserRead(false);
                 }
diff --git a/src/main/java/team9502/sinchulgwinong/global/exception/ErrorCode.java b/src/main/java/team9502/sinchulgwinong/global/exception/ErrorCode.java
index 393c752..60e082c 100644
--- a/src/main/java/team9502/sinchulgwinong/global/exception/ErrorCode.java
+++ b/src/main/java/team9502/sinchulgwinong/global/exception/ErrorCode.java
@@ -35,6 +35,7 @@ public enum ErrorCode {
 
     //chat
     CHAT_NOT_FOUND(HttpStatus.NOT_FOUND, "채팅을 찾을 수 없습니다."),
+    ALREADY_CREATE_CHAT(HttpStatus.NOT_FOUND, "이미 생성된 채팅방 입니다."),
 
     // Faq
     FAQ_NOT_FOUND(HttpStatus.NOT_FOUND, "FAQ를 찾을 수 없습니다."),