diff --git a/back/src/main/java/com/back/domain/mentoring/slot/repository/MentorSlotRepository.java b/back/src/main/java/com/back/domain/mentoring/slot/repository/MentorSlotRepository.java
index 82c73db5..12f3e6df 100644
--- a/back/src/main/java/com/back/domain/mentoring/slot/repository/MentorSlotRepository.java
+++ b/back/src/main/java/com/back/domain/mentoring/slot/repository/MentorSlotRepository.java
@@ -3,6 +3,7 @@
 import com.back.domain.mentoring.slot.dto.response.MentorSlotDto;
 import com.back.domain.mentoring.slot.entity.MentorSlot;
 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;
 
@@ -24,12 +25,7 @@ public interface MentorSlotRepository extends JpaRepository<MentorSlot, Long> {
             ms.mentor.member.id,
             ms.startDateTime,
             ms.endDateTime,
-            CASE
-                WHEN ms.startDateTime < CURRENT_TIMESTAMP
-                    AND ms.status = com.back.domain.mentoring.slot.constant.MentorSlotStatus.AVAILABLE
-                THEN com.back.domain.mentoring.slot.constant.MentorSlotStatus.EXPIRED
-                ELSE ms.status
-            END,
+            ms.status,
             r.id
         )
         FROM MentorSlot ms
@@ -60,7 +56,7 @@ List<MentorSlotDto> findMySlots(
         FROM MentorSlot ms
         WHERE ms.mentor.id = :mentorId
         AND ms.status = 'AVAILABLE'
-        AND ms.startDateTime >= CURRENT_TIMESTAMP
+        AND ms.startDateTime >= :now
         AND ms.startDateTime < :end
         AND ms.endDateTime >= :start
         ORDER BY ms.startDateTime ASC
@@ -68,7 +64,8 @@ List<MentorSlotDto> findMySlots(
     List<MentorSlotDto> findAvailableSlots(
         @Param("mentorId") Long mentorId,
         @Param("start") LocalDateTime start,
-        @Param("end") LocalDateTime end
+        @Param("end") LocalDateTime end,
+        @Param("now") LocalDateTime now
     );
 
     @Query("""
@@ -100,4 +97,15 @@ boolean existsOverlappingExcept(
         @Param("start") LocalDateTime start,
         @Param("end") LocalDateTime end
     );
+
+    @Modifying
+    @Query("""
+        UPDATE MentorSlot  ms
+        SET ms.status = com.back.domain.mentoring.slot.constant.MentorSlotStatus.EXPIRED
+        WHERE ms.startDateTime < :now
+        AND ms.status = com.back.domain.mentoring.slot.constant.MentorSlotStatus.AVAILABLE
+        """)
+    int expirePassedSlots(
+        @Param("now") LocalDateTime now
+    );
 }
diff --git a/back/src/main/java/com/back/domain/mentoring/slot/service/MentorSlotService.java b/back/src/main/java/com/back/domain/mentoring/slot/service/MentorSlotService.java
index 0103cecf..c9b496e4 100644
--- a/back/src/main/java/com/back/domain/mentoring/slot/service/MentorSlotService.java
+++ b/back/src/main/java/com/back/domain/mentoring/slot/service/MentorSlotService.java
@@ -12,6 +12,8 @@
 import com.back.domain.mentoring.slot.repository.MentorSlotRepository;
 import com.back.global.exception.ServiceException;
 import lombok.RequiredArgsConstructor;
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.scheduling.annotation.Scheduled;
 import org.springframework.stereotype.Service;
 import org.springframework.transaction.annotation.Transactional;
 
@@ -24,6 +26,7 @@
 
 @Service
 @RequiredArgsConstructor
+@Slf4j
 public class MentorSlotService {
 
     private final MentorSlotRepository mentorSlotRepository;
@@ -40,7 +43,8 @@ public List<MentorSlotDto> getMyMentorSlots(Mentor mentor, LocalDateTime startDa
     public List<MentorSlotDto> getAvailableMentorSlots(Long mentorId, LocalDateTime startDate, LocalDateTime endDate) {
         DateTimeValidator.validateTime(startDate, endDate);
 
-        return mentorSlotRepository.findAvailableSlots(mentorId, startDate, endDate);
+        LocalDateTime now = LocalDateTime.now();
+        return mentorSlotRepository.findAvailableSlots(mentorId, startDate, endDate, now);
     }
 
     @Transactional(readOnly = true)
@@ -147,6 +151,24 @@ private LocalDate findNextOrSameDayOfWeek(LocalDate startDate, DayOfWeek targetD
     }
 
 
+    // ===== 스케줄러 =====
+
+    /**
+     * 매 시간 30분에 지난 슬롯 만기 처리
+     * - AVAILABLE -> EXPIRED
+     */
+    @Scheduled(cron = "0 */30 * * * *")
+    @Transactional
+    public void expirePassedSlots() {
+        LocalDateTime now = LocalDateTime.now();
+
+        int updateCount = mentorSlotRepository.expirePassedSlots(now);
+        if (updateCount > 0) {
+            log.info("만료된 슬롯 {}개 업데이트 완료 at {}", updateCount, now);
+        }
+    }
+
+
     // ===== 검증 메서드 =====
 
     private static void validateOwner(MentorSlot mentorSlot, Mentor mentor) {
diff --git a/back/src/test/java/com/back/domain/mentoring/slot/service/MentorSlotServiceTest.java b/back/src/test/java/com/back/domain/mentoring/slot/service/MentorSlotServiceTest.java
index 7c3870e9..faf752d7 100644
--- a/back/src/test/java/com/back/domain/mentoring/slot/service/MentorSlotServiceTest.java
+++ b/back/src/test/java/com/back/domain/mentoring/slot/service/MentorSlotServiceTest.java
@@ -174,8 +174,9 @@ void getAvailableMentorSlots() {
             );
 
             List<MentorSlotDto> availableSlots = List.of(slotDto1, slotDto2);
+            LocalDateTime now = LocalDateTime.now();
 
-            when(mentorSlotRepository.findAvailableSlots(mentor1.getId(), startDate, endDate))
+            when(mentorSlotRepository.findAvailableSlots(mentor1.getId(), startDate, endDate, now))
                 .thenReturn(availableSlots);
 
             // when
@@ -183,7 +184,7 @@ void getAvailableMentorSlots() {
 
             // then
             assertThat(result).hasSize(2);
-            verify(mentorSlotRepository).findAvailableSlots(mentor1.getId(), startDate, endDate);
+            verify(mentorSlotRepository).findAvailableSlots(mentor1.getId(), startDate, endDate, now);
         }
     }