diff --git a/src/main/java/hous/server/domain/user/Onboarding.java b/src/main/java/hous/server/domain/user/Onboarding.java
index 945ec0c7..870e4c8c 100644
--- a/src/main/java/hous/server/domain/user/Onboarding.java
+++ b/src/main/java/hous/server/domain/user/Onboarding.java
@@ -25,6 +25,9 @@ public class Onboarding extends AuditingTimeEntity {
     @GeneratedValue(strategy = GenerationType.IDENTITY)
     private Long id;
 
+    @OneToOne(fetch = FetchType.LAZY)
+    @JoinColumn(name = "user_id", nullable = false)
+    private User user;
     @Column(length = 30)
     private String nickname;
 
@@ -65,8 +68,9 @@ public class Onboarding extends AuditingTimeEntity {
     @JoinColumn(name = "badge_id")
     private final List<Badge> badges = new ArrayList<>();
 
-    public static Onboarding newInstance(Personality personality, TestScore testScore) {
+    public static Onboarding newInstance(User user, Personality personality, TestScore testScore) {
         return Onboarding.builder()
+                .user(user)
                 .isChecked(false)
                 .personality(personality)
                 .testScore(testScore)
diff --git a/src/main/java/hous/server/domain/user/User.java b/src/main/java/hous/server/domain/user/User.java
index 7bd5fe59..928fdb62 100644
--- a/src/main/java/hous/server/domain/user/User.java
+++ b/src/main/java/hous/server/domain/user/User.java
@@ -26,21 +26,23 @@ public class User extends AuditingTimeEntity {
     @Enumerated(EnumType.STRING)
     private UserStatus status;
 
-    @OneToOne(fetch = FetchType.LAZY, cascade = CascadeType.ALL, orphanRemoval = true)
-    @JoinColumn(name = "onboarding_id", nullable = false)
+    @OneToOne(mappedBy = "user", fetch = FetchType.LAZY, cascade = CascadeType.ALL, orphanRemoval = true)
     private Onboarding onboarding;
 
     @OneToOne(fetch = FetchType.LAZY, cascade = CascadeType.ALL, orphanRemoval = true)
     @JoinColumn(name = "setting_id", nullable = false)
     private Setting setting;
 
-    public static User newInstance(String socialId, UserSocialType socialType, String fcmToken, Onboarding onboarding, Setting setting) {
+    public static User newInstance(String socialId, UserSocialType socialType, String fcmToken, Setting setting) {
         return User.builder()
                 .socialInfo(SocialInfo.of(socialId, socialType))
                 .fcmToken(fcmToken)
-                .onboarding(onboarding)
                 .setting(setting)
                 .status(UserStatus.ACTIVE)
                 .build();
     }
+
+    public void setOnboarding(Onboarding onboarding) {
+        this.onboarding = onboarding;
+    }
 }
diff --git a/src/main/java/hous/server/service/user/UserService.java b/src/main/java/hous/server/service/user/UserService.java
index 0222fd64..d61d9ad0 100644
--- a/src/main/java/hous/server/service/user/UserService.java
+++ b/src/main/java/hous/server/service/user/UserService.java
@@ -33,11 +33,14 @@ public class UserService {
 
     public Long registerUser(CreateUserDto request) {
         UserServiceUtils.validateNotExistsUser(userRepository, request.getSocialId(), request.getSocialType());
-        User user = userRepository.save(User.newInstance(request.getSocialId(), request.getSocialType(), request.getFcmToken(),
-                onboardingRepository.save(
-                        Onboarding.newInstance(personalityRepository.findPersonalityByColor(PersonalityColor.GRAY),
-                                testScoreRepository.save(TestScore.newInstance()))),
+        User user = userRepository.save(User.newInstance(
+                request.getSocialId(), request.getSocialType(), request.getFcmToken(),
                 settingRepository.save(Setting.newInstance())));
+        Onboarding onboarding = onboardingRepository.save(Onboarding.newInstance(
+                user,
+                personalityRepository.findPersonalityByColor(PersonalityColor.GRAY),
+                testScoreRepository.save(TestScore.newInstance())));
+        user.setOnboarding(onboarding);
         return user.getId();
     }