diff --git a/src/main/java/com/Timo/Timo/domain/timer/repository/TimerRecordRepository.java b/src/main/java/com/Timo/Timo/domain/timer/repository/TimerRecordRepository.java
index f2959c24..dcb13d4f 100644
--- a/src/main/java/com/Timo/Timo/domain/timer/repository/TimerRecordRepository.java
+++ b/src/main/java/com/Timo/Timo/domain/timer/repository/TimerRecordRepository.java
@@ -3,6 +3,7 @@
 import com.Timo.Timo.domain.timer.entity.TimerRecord;
 import com.Timo.Timo.domain.timer.enums.TimerStatus;
 import jakarta.persistence.LockModeType;
+import java.time.LocalDate;
 import java.time.LocalDateTime;
 import java.util.List;
 import java.util.Optional;
@@ -18,6 +19,9 @@ public interface TimerRecordRepository extends JpaRepository<TimerRecord, Long>
 
   boolean existsByTodo_IdAndStatusIn(Long todoId, List<TimerStatus> statuses);
 
+  boolean existsByTodo_IdAndTargetDateAndStatusIn(
+      Long todoId, LocalDate targetDate, List<TimerStatus> statuses);
+
   @Modifying(clearAutomatically = true)
   @Query("delete from TimerRecord r where r.todo.id = :todoId")
   void deleteByTodoId(@Param("todoId") Long todoId);
diff --git a/src/main/java/com/Timo/Timo/domain/timer/service/TimerService.java b/src/main/java/com/Timo/Timo/domain/timer/service/TimerService.java
index 8eea3fb4..778984a6 100644
--- a/src/main/java/com/Timo/Timo/domain/timer/service/TimerService.java
+++ b/src/main/java/com/Timo/Timo/domain/timer/service/TimerService.java
@@ -184,6 +184,10 @@ public boolean hasActiveTimer(Long todoId) {
     return timerRecordRepository.existsByTodo_IdAndStatusIn(todoId, ACTIVE_STATUS);
   }
 
+  public boolean hasActiveTimerOn(Long todoId, LocalDate date) {
+    return timerRecordRepository.existsByTodo_IdAndTargetDateAndStatusIn(todoId, date, ACTIVE_STATUS);
+  }
+
   @Transactional
   public void deleteTimersByTodo(Long todoId) {
     timerSessionRepository.deleteByTodoId(todoId);
diff --git a/src/main/java/com/Timo/Timo/domain/todo/service/TodoService.java b/src/main/java/com/Timo/Timo/domain/todo/service/TodoService.java
index c9cad042..f3446eed 100644
--- a/src/main/java/com/Timo/Timo/domain/todo/service/TodoService.java
+++ b/src/main/java/com/Timo/Timo/domain/todo/service/TodoService.java
@@ -137,7 +137,7 @@ public TodoStatusChangeResponse changeCompletion(Long userId, Long todoId, TodoS
       throw new CustomException(TodoErrorCode.TODO_NOT_FOUND);
     }
 
-    if (timerService.hasActiveTimer(todoId)) {
+    if (timerService.hasActiveTimerOn(todoId, date)) {
       throw new CustomException(TodoErrorCode.TIMER_RUNNING);
     }