diff --git a/src/main/java/com/goorm/team9/icontact/config/jpa/JpaConfig.java b/src/main/java/com/goorm/team9/icontact/config/jpa/JpaConfig.java
index a3d5112d..91f1c0b9 100644
--- a/src/main/java/com/goorm/team9/icontact/config/jpa/JpaConfig.java
+++ b/src/main/java/com/goorm/team9/icontact/config/jpa/JpaConfig.java
@@ -2,8 +2,10 @@
 
 import org.springframework.context.annotation.Configuration;
 import org.springframework.data.jpa.repository.config.EnableJpaAuditing;
+import org.springframework.transaction.annotation.EnableTransactionManagement;
 
 @Configuration
 @EnableJpaAuditing
+@EnableTransactionManagement
 public class JpaConfig {
 }
diff --git a/src/main/java/com/goorm/team9/icontact/domain/chat/repository/ChatMessageRepository.java b/src/main/java/com/goorm/team9/icontact/domain/chat/repository/ChatMessageRepository.java
index ce96d26c..43c31b6a 100644
--- a/src/main/java/com/goorm/team9/icontact/domain/chat/repository/ChatMessageRepository.java
+++ b/src/main/java/com/goorm/team9/icontact/domain/chat/repository/ChatMessageRepository.java
@@ -4,8 +4,10 @@
 import com.goorm.team9.icontact.domain.chat.entity.ChatRoom;
 import com.goorm.team9.icontact.domain.client.entity.ClientEntity;
 import org.springframework.data.jpa.repository.JpaRepository;
+import org.springframework.data.jpa.repository.Modifying;
 import org.springframework.data.jpa.repository.Query;
 import org.springframework.data.repository.query.Param;
+import org.springframework.transaction.annotation.Transactional;
 
 import java.util.List;
 
@@ -31,4 +33,14 @@ List<ChatMessage> findUnreadMessages(@Param("chatRoom") ChatRoom chatRoom,
     @Query("SELECT m FROM ChatMessage m WHERE m.chatRoom = :chatRoom ORDER BY m.created_at ASC")
     List<ChatMessage> findByChatRoomOrderByCreatedAtAsc(@Param("chatRoom") ChatRoom chatRoom);
 
+    @Modifying
+    @Query("UPDATE ChatMessage m " +
+            "SET m.isRead = true " +
+            "WHERE m.chatRoom = :chatRoom " +
+            "AND m.isRead = false " +
+            "AND m.senderNickname <> :readerNickname")
+    int markMessagesAsRead(@Param("chatRoom") ChatRoom chatRoom,
+                           @Param("readerNickname") String readerNickname);
+
+
 }
\ No newline at end of file
diff --git a/src/main/java/com/goorm/team9/icontact/domain/chat/service/ChatMessageService.java b/src/main/java/com/goorm/team9/icontact/domain/chat/service/ChatMessageService.java
index 0b3aca98..d8c9edd3 100644
--- a/src/main/java/com/goorm/team9/icontact/domain/chat/service/ChatMessageService.java
+++ b/src/main/java/com/goorm/team9/icontact/domain/chat/service/ChatMessageService.java
@@ -12,6 +12,7 @@
 import com.goorm.team9.icontact.domain.client.entity.ClientEntity;
 import com.goorm.team9.icontact.domain.client.repository.ClientRepository;
 import lombok.RequiredArgsConstructor;
+import lombok.extern.slf4j.Slf4j;
 import org.springframework.http.HttpStatus;
 import org.springframework.messaging.simp.SimpMessagingTemplate;
 import org.springframework.stereotype.Service;
@@ -21,6 +22,7 @@
 import java.util.List;
 import java.util.stream.Collectors;
 
+@Slf4j
 @Service
 @RequiredArgsConstructor
 public class ChatMessageService {
@@ -144,13 +146,11 @@ public void markMessagesAsRead(Long roomId, Long clientId) {
         ClientEntity reader = clientRepository.findById(clientId)
                 .orElseThrow(() -> new IllegalArgumentException("사용자를 찾을 수 없습니다."));
 
-        List<ChatMessage> unreadMessages = chatMessageRepository.findUnreadMessages(chatRoom, reader);
+        int updatedCount = chatMessageRepository.markMessagesAsRead(chatRoom, reader.getNickName());
 
-        for (ChatMessage chatMessage : unreadMessages) {
-            chatMessage.markAsRead();
+        if (updatedCount > 0) {
+            log.info("✅ {}개의 메시지를 읽음 처리했습니다. [roomId={}, reader={}]", updatedCount, roomId, reader.getNickName());
         }
-
-        chatMessageRepository.saveAll(unreadMessages);
     }
 
 }
\ No newline at end of file