diff --git a/backend/src/main/java/com/festago/domain/Festival.java b/backend/src/main/java/com/festago/domain/Festival.java
index c2d0bfe0b..cbfb8a102 100644
--- a/backend/src/main/java/com/festago/domain/Festival.java
+++ b/backend/src/main/java/com/festago/domain/Festival.java
@@ -71,12 +71,19 @@ private void checkNotNull(String name, LocalDate startDate, LocalDate endDate, S
     }
 
     private void checkLength(String name, String thumbnail) {
-        if (name.length() > 50 ||
-            thumbnail.length() > 255) {
+        if (overLength(name, 50) ||
+            overLength(thumbnail, 255)) {
             throw new IllegalArgumentException("Festival 의 필드로 허용된 길이를 넘은 column 을 넣을 수 없습니다.");
         }
     }
 
+    private boolean overLength(String target, int maxLength) {
+        if (Objects.isNull(target)) {
+            return false;
+        }
+        return target.length() > maxLength;
+    }
+
     private void validateDate(LocalDate startDate, LocalDate endDate) {
         if (startDate.isAfter(endDate)) {
             throw new BadRequestException(ErrorCode.INVALID_FESTIVAL_DURATION);
diff --git a/backend/src/main/java/com/festago/domain/Member.java b/backend/src/main/java/com/festago/domain/Member.java
index 4646f79bb..3cfe89ce4 100644
--- a/backend/src/main/java/com/festago/domain/Member.java
+++ b/backend/src/main/java/com/festago/domain/Member.java
@@ -52,7 +52,7 @@ public Member(String socialId, SocialType socialType, String nickname, String pr
     }
 
     public Member(Long id, String socialId, SocialType socialType, String nickname, String profileImage) {
-        validate(socialId, socialType, nickname);
+        validate(socialId, socialType, nickname, profileImage);
         this.id = id;
         this.socialId = socialId;
         this.socialType = socialType;
@@ -60,7 +60,7 @@ public Member(Long id, String socialId, SocialType socialType, String nickname,
         this.profileImage = (profileImage != null) ? profileImage : DEFAULT_IMAGE_URL;
     }
 
-    private void validate(String socialId, SocialType socialType, String nickname) {
+    private void validate(String socialId, SocialType socialType, String nickname, String profileImage) {
         checkNotNull(socialId, socialType, nickname);
         checkLength(socialId, nickname, profileImage);
     }
@@ -74,13 +74,20 @@ private void checkNotNull(String socialId, SocialType socialType, String nicknam
     }
 
     private void checkLength(String socialId, String nickname, String profileImage) {
-        if (socialId.length() > 255 ||
-            nickname.length() > 30 ||
-            profileImage.length() > 255) {
+        if (overLength(socialId, 255) ||
+            overLength(nickname, 30) ||
+            overLength(profileImage, 255)) {
             throw new IllegalArgumentException("Member 의 필드로 허용된 길이를 넘은 column 을 넣을 수 없습니다.");
         }
     }
 
+    private boolean overLength(String target, int maxLength) {
+        if (Objects.isNull(target)) {
+            return false;
+        }
+        return target.length() > maxLength;
+    }
+
     public Long getId() {
         return id;
     }
diff --git a/backend/src/main/java/com/festago/domain/Stage.java b/backend/src/main/java/com/festago/domain/Stage.java
index 72061d1b0..e1b7e10e0 100644
--- a/backend/src/main/java/com/festago/domain/Stage.java
+++ b/backend/src/main/java/com/festago/domain/Stage.java
@@ -75,11 +75,18 @@ private void checkNotNull(LocalDateTime startTime, LocalDateTime ticketOpenTime,
     }
 
     private void checkLength(String lineUp) {
-        if (lineUp.length() > 255) {
+        if (overLength(lineUp, 255)) {
             throw new IllegalArgumentException("Stage 의 필드로 허용된 범위를 넘은 column 을 넣을 수 없습니다.");
         }
     }
 
+    private boolean overLength(String target, int maxLength) {
+        if (Objects.isNull(target)) {
+            return false;
+        }
+        return target.length() > maxLength;
+    }
+
     private void validateTime(LocalDateTime startTime, LocalDateTime ticketOpenTime, Festival festival) {
         if (festival.isNotInDuration(startTime)) {
             throw new BadRequestException(ErrorCode.INVALID_STAGE_START_TIME);