diff --git a/src/main/java/com/back/domain/study/plan/controller/StudyPlanController.java b/src/main/java/com/back/domain/study/plan/controller/StudyPlanController.java
index 6f163c04..9f49f8b6 100644
--- a/src/main/java/com/back/domain/study/plan/controller/StudyPlanController.java
+++ b/src/main/java/com/back/domain/study/plan/controller/StudyPlanController.java
@@ -10,6 +10,7 @@
 import com.back.global.security.user.CustomUserDetails;
 import io.swagger.v3.oas.annotations.Operation;
 import io.swagger.v3.oas.annotations.tags.Tag;
+import jakarta.validation.Valid;
 import lombok.RequiredArgsConstructor;
 import org.springframework.format.annotation.DateTimeFormat;
 import org.springframework.http.ResponseEntity;
@@ -34,7 +35,7 @@ public class StudyPlanController {
     public ResponseEntity<RsData<StudyPlanResponse>> createStudyPlan(
             // 로그인 유저 정보 받기
             @AuthenticationPrincipal CustomUserDetails user,
-            @RequestBody StudyPlanRequest request) {
+            @Valid @RequestBody StudyPlanRequest request) {
         //커스텀 디테일 구현 시 사용
         Long userId = user.getUserId();
         StudyPlanResponse response = studyPlanService.createStudyPlan(userId, request);
@@ -93,7 +94,7 @@ public ResponseEntity<RsData<List<StudyPlanResponse>>> getStudyPlansForPeriod(
     public ResponseEntity<RsData<StudyPlanResponse>> updateStudyPlan(
             @AuthenticationPrincipal CustomUserDetails user,
             @PathVariable Long planId,
-            @RequestBody StudyPlanRequest request,
+            @Valid @RequestBody StudyPlanRequest request,
             @RequestParam(name = "applyScope", required = true) ApplyScope applyScope) {
         Long userId = user.getUserId();
 
diff --git a/src/main/java/com/back/domain/study/plan/dto/StudyPlanRequest.java b/src/main/java/com/back/domain/study/plan/dto/StudyPlanRequest.java
index 1af2c4f9..e4470109 100644
--- a/src/main/java/com/back/domain/study/plan/dto/StudyPlanRequest.java
+++ b/src/main/java/com/back/domain/study/plan/dto/StudyPlanRequest.java
@@ -4,6 +4,10 @@
 import com.back.domain.study.plan.entity.DayOfWeek;
 import com.back.domain.study.plan.entity.Frequency;
 import com.fasterxml.jackson.annotation.JsonFormat;
+import jakarta.persistence.Column;
+import jakarta.validation.constraints.NotBlank;
+import jakarta.validation.constraints.NotNull;
+import jakarta.validation.constraints.Size;
 import lombok.AllArgsConstructor;
 import lombok.Getter;
 import lombok.NoArgsConstructor;
@@ -19,10 +23,13 @@
 @Setter
 @NoArgsConstructor
 public class StudyPlanRequest {
+    @NotBlank
+    @Size(max = 100)
     private String subject;
 
+    @NotNull
     private LocalDateTime startDate;
-
+    @NotNull
     private LocalDateTime endDate;
 
     private Color color;
diff --git a/src/main/java/com/back/domain/study/plan/entity/StudyPlanException.java b/src/main/java/com/back/domain/study/plan/entity/StudyPlanException.java
index 6843c6a8..3ae0e253 100644
--- a/src/main/java/com/back/domain/study/plan/entity/StudyPlanException.java
+++ b/src/main/java/com/back/domain/study/plan/entity/StudyPlanException.java
@@ -35,7 +35,7 @@ public class StudyPlanException extends BaseEntity {
 
     // 적용 범위 (이 날짜만 / 이후 모든 날짜)
     @Enumerated(EnumType.STRING)
-    @Column(name = "apply_scope")
+    @Column(name = "apply_scope", nullable = false)
     private ApplyScope applyScope;
 
     // 수정된 내용 (MODIFIED 타입인 경우)
diff --git a/src/main/java/com/back/domain/study/plan/service/StudyPlanService.java b/src/main/java/com/back/domain/study/plan/service/StudyPlanService.java
index 66fa1cb4..2101f504 100644
--- a/src/main/java/com/back/domain/study/plan/service/StudyPlanService.java
+++ b/src/main/java/com/back/domain/study/plan/service/StudyPlanService.java
@@ -103,6 +103,7 @@ public List<StudyPlanResponse> getStudyPlansForDate(Long userId, LocalDate date)
                 }
             }
         }
+
         return result;
     }
 
@@ -167,6 +168,7 @@ private StudyPlanResponse createVirtualPlanForDate(StudyPlan originalPlan, Local
             // 수정 타입의 경우 수정된 내용으로 가상 정보 생성 후 반환
             return createModifiedVirtualPlan(originalPlan, exception, targetDate);
         }
+
         //예외 사항 없으면 기본 가상 계획 생성
         return createBasicVirtualPlan(originalPlan, targetDate);
     }