diff --git a/backend/src/main/java/org/example/backend/timetable/service/TimetableService.java b/backend/src/main/java/org/example/backend/timetable/service/TimetableService.java
index f58142a4..fac21f2b 100644
--- a/backend/src/main/java/org/example/backend/timetable/service/TimetableService.java
+++ b/backend/src/main/java/org/example/backend/timetable/service/TimetableService.java
@@ -1,14 +1,19 @@
 package org.example.backend.timetable.service;
 
-import jakarta.persistence.EntityNotFoundException;
+import static org.example.backend.seminarRoom.exception.SeminarRoomExceptionType.NOT_FOUND_SEMINAR_ROOM;
+import static org.example.backend.timetable.exception.TimetableExceptionType.NOT_FOUND_TIMETABLE;
+
 import java.util.List;
 import java.util.stream.Collectors;
 import lombok.RequiredArgsConstructor;
 import org.example.backend.seminarRoom.domain.SeminarRoom;
+import org.example.backend.seminarRoom.exception.SeminarRoomException;
 import org.example.backend.seminarRoom.repository.SeminarRoomRepository;
 import org.example.backend.timetable.domain.Timetable;
 import org.example.backend.timetable.domain.dto.TimetableReqDto;
 import org.example.backend.timetable.domain.dto.TimetableResDto;
+import org.example.backend.timetable.exception.TimetableException;
+import org.example.backend.timetable.exception.TimetableExceptionType;
 import org.example.backend.timetable.repository.TimetableRepository;
 import org.springframework.stereotype.Service;
 import org.springframework.transaction.annotation.Transactional;
@@ -23,7 +28,7 @@ public class TimetableService {
     @Transactional
     public TimetableResDto createTimetable(TimetableReqDto reqDto) {
         SeminarRoom seminarRoom = seminarRoomRepository.findById(reqDto.getSeminarRoomId())
-                .orElseThrow(() -> new IllegalArgumentException("세미나실이 존재하지 않습니다."));
+                .orElseThrow(() -> new TimetableException(NOT_FOUND_TIMETABLE));
 
         validateTimeRange(reqDto);
 
@@ -42,10 +47,10 @@ public List<TimetableResDto> getAllTimetables() {
     @Transactional
     public TimetableResDto updateTimetable(Long timetableId, TimetableReqDto reqDto) {
         Timetable timetable = timetableRepository.findById(timetableId)
-                .orElseThrow(() -> new IllegalArgumentException("시간표가 존재하지 않습니다."));
+                .orElseThrow(() -> new TimetableException(NOT_FOUND_TIMETABLE));
 
         SeminarRoom seminarRoom = seminarRoomRepository.findById(reqDto.getSeminarRoomId())
-                .orElseThrow(() -> new IllegalArgumentException("세미나실이 존재하지 않습니다."));
+                .orElseThrow(() -> new SeminarRoomException(NOT_FOUND_SEMINAR_ROOM));
 
         validateTimeRange(reqDto);
 
@@ -56,16 +61,16 @@ public TimetableResDto updateTimetable(Long timetableId, TimetableReqDto reqDto)
     @Transactional
     public void deleteTimetable(Long timetableId) {
         Timetable timetable = timetableRepository.findById(timetableId)
-                .orElseThrow(() -> new IllegalArgumentException("시간표가 존재하지 않습니다."));
+                .orElseThrow(() -> new TimetableException(NOT_FOUND_TIMETABLE));
         timetableRepository.delete(timetable);
     }
 
     private void validateTimeRange(TimetableReqDto reqDto) {
         if (reqDto.getStartDate().isAfter(reqDto.getEndDate())) {
-            throw new IllegalArgumentException("시작 날짜는 종료 날짜보다 이후일 수 없습니다.");
+            throw new TimetableException(TimetableExceptionType.INVALID_INPUT_TIME);
         }
         if (reqDto.getStartTime().isAfter(reqDto.getEndTime())) {
-            throw new IllegalArgumentException("시작 시간은 종료 시간보다 이후일 수 없습니다.");
+            throw new TimetableException(TimetableExceptionType.INVALID_INPUT_TIME);
         }
     }
 }
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