diff --git a/src/main/java/kr/co/conceptbe/notification/app/NotificationService.java b/src/main/java/kr/co/conceptbe/notification/app/NotificationService.java
index 801e82d..49e2212 100644
--- a/src/main/java/kr/co/conceptbe/notification/app/NotificationService.java
+++ b/src/main/java/kr/co/conceptbe/notification/app/NotificationService.java
@@ -1,5 +1,6 @@
 package kr.co.conceptbe.notification.app;
 
+import javax.management.Notification;
 import kr.co.conceptbe.auth.presentation.dto.AuthCredentials;
 import kr.co.conceptbe.idea.domain.Idea;
 import kr.co.conceptbe.idea.domain.event.CreatedIdeaEvent;
@@ -47,8 +48,20 @@ public void createNotificationByCreateIdeaEvent(CreatedIdeaEvent createdIdeaEven
         Idea idea = createdIdeaEvent.idea();
         List<IdeaNotificationSetting> notificationSettings = notificationSettingRepository.findAll();
 
-        List<IdeaNotification> ideaNotifications = notificationTrigger.getNotificationByCreatedIdeaEvent(idea, notificationSettings);
+        List<IdeaNotification> ideaNotifications = notificationTrigger.getNotificationByCreatedIdeaEvent(idea,
+                notificationSettings);
         notificationRepository.saveAll(ideaNotifications);
     }
 
+    @Transactional
+    public void readNotification(AuthCredentials auth, Long notificationId) {
+        Long memberId = auth.id();
+        IdeaNotification notification = notificationRepository.findByMemberIdAndId(memberId, notificationId)
+                .orElseThrow(
+                        () -> new IllegalArgumentException("Not Found Notification ID : " + notificationId)
+                );
+        notification.read(memberId);
+        notificationRepository.save(notification);
+    }
+
 }
diff --git a/src/main/java/kr/co/conceptbe/notification/domain/IdeaNotification.java b/src/main/java/kr/co/conceptbe/notification/domain/IdeaNotification.java
index 92e5500..c917cbe 100644
--- a/src/main/java/kr/co/conceptbe/notification/domain/IdeaNotification.java
+++ b/src/main/java/kr/co/conceptbe/notification/domain/IdeaNotification.java
@@ -44,6 +44,9 @@ public class IdeaNotification extends BaseTimeEntity {
     @Column(nullable = false)
     private String cooperationWay;
 
+    @Column(nullable = false)
+    private boolean isAlreadyRead;
+
     public static IdeaNotification withIdea(Idea idea, IdeaNotificationSetting notificationSetting) {
         Long receiverId = notificationSetting.getMemberId();
         String title = idea.getTitle();
@@ -63,7 +66,8 @@ public static IdeaNotification withIdea(Idea idea, IdeaNotificationSetting notif
                 idea.getId(),
                 joinBadges(branchBadges, Function.identity()),
                 joinBadges(purposes, purpose -> purpose.getPurpose().getName()),
-                cooperationWay
+                cooperationWay,
+                false
         );
     }
 
@@ -100,4 +104,11 @@ private List<String> splitBadges(String badges) {
         return new ArrayList<>(List.of(badgesEach));
     }
 
+    public void read(Long memberId) {
+        if (!memberId.equals(this.memberId)) {
+            throw new IllegalArgumentException("다른 계정의 알림을 읽을 수 없습니다.");
+        }
+        isAlreadyRead = true;
+    }
+
 }
diff --git a/src/main/java/kr/co/conceptbe/notification/domain/repository/NotificationRepository.java b/src/main/java/kr/co/conceptbe/notification/domain/repository/NotificationRepository.java
index ed295a7..3a3e5d1 100644
--- a/src/main/java/kr/co/conceptbe/notification/domain/repository/NotificationRepository.java
+++ b/src/main/java/kr/co/conceptbe/notification/domain/repository/NotificationRepository.java
@@ -1,5 +1,6 @@
 package kr.co.conceptbe.notification.domain.repository;
 
+import java.util.Optional;
 import kr.co.conceptbe.notification.domain.IdeaNotification;
 import org.springframework.data.jpa.repository.JpaRepository;
 import org.springframework.data.jpa.repository.Query;
@@ -16,4 +17,6 @@ public interface NotificationRepository extends JpaRepository<IdeaNotification,
             """, nativeQuery = true)
     List<IdeaNotification> findAllNotifications(Long memberId, Long cursorId, Long limit);
 
+    Optional<IdeaNotification> findByMemberIdAndId(Long memberId, Long notificationId);
+
 }
diff --git a/src/main/java/kr/co/conceptbe/notification/presentation/NotificationController.java b/src/main/java/kr/co/conceptbe/notification/presentation/NotificationController.java
index 0c18cd3..ee44a62 100644
--- a/src/main/java/kr/co/conceptbe/notification/presentation/NotificationController.java
+++ b/src/main/java/kr/co/conceptbe/notification/presentation/NotificationController.java
@@ -9,6 +9,8 @@
 import lombok.RequiredArgsConstructor;
 import org.springframework.http.ResponseEntity;
 import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.PathVariable;
+import org.springframework.web.bind.annotation.PutMapping;
 import org.springframework.web.bind.annotation.RequestMapping;
 import org.springframework.web.bind.annotation.RequestParam;
 import org.springframework.web.bind.annotation.RestController;
@@ -24,13 +26,24 @@ public class NotificationController implements NotificationSwagger {
 
     @GetMapping
     public ResponseEntity<List<NotificationResponse>> getNotifications(
-            @Parameter(hidden = true) @Auth AuthCredentials auth,
+            @Auth AuthCredentials auth,
             @RequestParam(required = false, defaultValue = "" + Long.MAX_VALUE) Long cursorId
     ) {
         Long limit = 10L;
-        List<NotificationResponse> responses = notificationService.findAllNotifications(auth, cursorId, limit);
+        List<NotificationResponse> responses = notificationService.findAllNotifications(auth, cursorId,
+                limit);
 
         return ResponseEntity.ok(responses);
     }
 
+    @PutMapping("/{notificationId}/read")
+    public ResponseEntity<Void> readNotification(
+            @Auth AuthCredentials auth,
+            @PathVariable Long notificationId
+    ) {
+        notificationService.readNotification(auth, notificationId);
+
+        return ResponseEntity.ok().build();
+    }
+
 }
diff --git a/src/main/java/kr/co/conceptbe/notification/presentation/swagger/NotificationSwagger.java b/src/main/java/kr/co/conceptbe/notification/presentation/swagger/NotificationSwagger.java
index bbe6734..bbfb829 100644
--- a/src/main/java/kr/co/conceptbe/notification/presentation/swagger/NotificationSwagger.java
+++ b/src/main/java/kr/co/conceptbe/notification/presentation/swagger/NotificationSwagger.java
@@ -17,4 +17,9 @@ ResponseEntity<List<NotificationResponse>> getNotifications(
             Long cursorId
     );
 
+    ResponseEntity<Void> readNotification(
+            @Parameter(hidden = true) AuthCredentials auth,
+            Long notificationId
+    );
+
 }