diff --git a/Segno/Segno.xcodeproj/project.pbxproj b/Segno/Segno.xcodeproj/project.pbxproj
index 4aae17e..511c8b3 100644
--- a/Segno/Segno.xcodeproj/project.pbxproj
+++ b/Segno/Segno.xcodeproj/project.pbxproj
@@ -71,6 +71,7 @@
 		982A2A472924AE74006F6ACD /* UserDefaultsKey.swift in Sources */ = {isa = PBXBuildFile; fileRef = 982A2A462924AE74006F6ACD /* UserDefaultsKey.swift */; };
 		982A3699292C905300FDC6CF /* DiaryDetailViewController.swift in Sources */ = {isa = PBXBuildFile; fileRef = 982A3698292C905300FDC6CF /* DiaryDetailViewController.swift */; };
 		982B3B7F292E68FB0077A44B /* DiaryDetailViewModel.swift in Sources */ = {isa = PBXBuildFile; fileRef = 982B3B7E292E68FB0077A44B /* DiaryDetailViewModel.swift */; };
+		9838443E29387C0A00BCCEE2 /* ChangeNicknameEndpoint.swift in Sources */ = {isa = PBXBuildFile; fileRef = 9838443D29387C0A00BCCEE2 /* ChangeNicknameEndpoint.swift */; };
 		983AE9D22934F041006547BD /* NicknameCell.swift in Sources */ = {isa = PBXBuildFile; fileRef = 983AE9D12934F041006547BD /* NicknameCell.swift */; };
 		983AE9D4293513AD006547BD /* SettingsCellModel.swift in Sources */ = {isa = PBXBuildFile; fileRef = 983AE9D3293513AD006547BD /* SettingsCellModel.swift */; };
 		983AE9D6293514E8006547BD /* SettingsActionSheetCell.swift in Sources */ = {isa = PBXBuildFile; fileRef = 983AE9D5293514E8006547BD /* SettingsActionSheetCell.swift */; };
@@ -155,6 +156,7 @@
 		982A2A462924AE74006F6ACD /* UserDefaultsKey.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = UserDefaultsKey.swift; sourceTree = "<group>"; };
 		982A3698292C905300FDC6CF /* DiaryDetailViewController.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = DiaryDetailViewController.swift; sourceTree = "<group>"; };
 		982B3B7E292E68FB0077A44B /* DiaryDetailViewModel.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = DiaryDetailViewModel.swift; sourceTree = "<group>"; };
+		9838443D29387C0A00BCCEE2 /* ChangeNicknameEndpoint.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = ChangeNicknameEndpoint.swift; sourceTree = "<group>"; };
 		983AE9D12934F041006547BD /* NicknameCell.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = NicknameCell.swift; sourceTree = "<group>"; };
 		983AE9D3293513AD006547BD /* SettingsCellModel.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = SettingsCellModel.swift; sourceTree = "<group>"; };
 		983AE9D5293514E8006547BD /* SettingsActionSheetCell.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = SettingsActionSheetCell.swift; sourceTree = "<group>"; };
@@ -307,10 +309,10 @@
 			isa = PBXGroup;
 			children = (
 				9841D6162925FACC00318EA9 /* LoginUseCase.swift */,
-				7940FB32292E065F00276EFC /* DiaryDetailUseCase.swift */,
 				988414DA2923606B007C9132 /* DiaryListUseCase.swift */,
-				66A8CF682937945300C17F84 /* UserDetailUseCase.swift */,
+				7940FB32292E065F00276EFC /* DiaryDetailUseCase.swift */,
 				791529D72932F364005A8DDB /* DiaryEditUseCase.swift */,
+				66A8CF682937945300C17F84 /* UserDetailUseCase.swift */,
 				9894EAF429373385005F2B15 /* SettingsUseCase.swift */,
 				9825F41A29377875005F2163 /* ChangeUserNameUseCase.swift */,
 			);
@@ -426,6 +428,7 @@
 				4F4E0D7529252236005ABA8F /* LoginEndpoint.swift */,
 				66A8CF6C29379A9900C17F84 /* UserDetailEndpoint.swift */,
 				791529DD29333D40005A8DDB /* ImageEndpoint.swift */,
+				9838443D29387C0A00BCCEE2 /* ChangeNicknameEndpoint.swift */,
 			);
 			path = Endpoints;
 			sourceTree = "<group>";
@@ -593,6 +596,7 @@
 				982A3699292C905300FDC6CF /* DiaryDetailViewController.swift in Sources */,
 				9825F41B29377875005F2163 /* ChangeUserNameUseCase.swift in Sources */,
 				666E6F8C291CFAC200CECD4B /* DiaryCollectionViewController.swift in Sources */,
+				9838443E29387C0A00BCCEE2 /* ChangeNicknameEndpoint.swift in Sources */,
 				666E6F8A291CF82700CECD4B /* TabBarPageCase.swift in Sources */,
 				66A8CF652937934A00C17F84 /* MyPageRepository.swift in Sources */,
 				79183800292225DC00BC6992 /* UIFont+.swift in Sources */,
diff --git a/Segno/Segno/Domain/UseCase/ChangeUserNameUseCase.swift b/Segno/Segno/Domain/UseCase/ChangeUserNameUseCase.swift
index 296a51e..86b3357 100644
--- a/Segno/Segno/Domain/UseCase/ChangeUserNameUseCase.swift
+++ b/Segno/Segno/Domain/UseCase/ChangeUserNameUseCase.swift
@@ -8,7 +8,7 @@
 import RxSwift
 
 protocol ChangeUserNameUseCase {
-    func requestChangeNickname(to nickname: String) -> Bool
+    func requestChangeNickname(to nickname: String) -> Single<Bool>
 }
 
 final class ChangeUserNameUseCaseImpl: ChangeUserNameUseCase {
@@ -19,9 +19,7 @@ final class ChangeUserNameUseCaseImpl: ChangeUserNameUseCase {
         self.repository = repository
     }
     
-    func requestChangeNickname(to nickname: String) -> Bool {
-        // 임시 처리입니다.
-        debugPrint("SettingsUseCase - requestChangeNickname : \(nickname)으로 변경")
-        return true
+    func requestChangeNickname(to nickname: String) -> Single<Bool> {
+        return repository.changeNickname(to: nickname)
     }
 }
diff --git a/Segno/Segno/Presentation/ViewController/SettingsViewController.swift b/Segno/Segno/Presentation/ViewController/SettingsViewController.swift
index 6eb369d..ef1a8b8 100644
--- a/Segno/Segno/Presentation/ViewController/SettingsViewController.swift
+++ b/Segno/Segno/Presentation/ViewController/SettingsViewController.swift
@@ -70,17 +70,19 @@ final class SettingsViewController: UIViewController {
                           let self = self else { return UITableViewCell() }
                     
                     cell.okButton.rx.tap
-                        .flatMap { a in
+                        .flatMap { _ in
                             guard let newNickname = cell.nicknameTextField.text else {
                                 return Observable<Bool>.empty()
                             }
+                            
                             return self.viewModel.changeNickname(to: newNickname)
+                                .asObservable()
                         }
                         .subscribe(onNext: { result in
-                            debugPrint("여기에서 \(result)에 대한 피드백 Alert 띄웁니다.")
+                            debugPrint("닉네임 변경 결과 : \(result)")
+                            // TODO: 성공/실패 알럿띄우기
                         })
                         .disposed(by: self.disposeBag)
-                    
                     return cell
                 case .settingsSwitch(let title, let isOn):
                     guard let cell = tableView.dequeueReusableCell(withIdentifier: "SettingsSwitchCell") as? SettingsSwitchCell,
diff --git a/Segno/Segno/Presentation/ViewModel/SettingsViewModel.swift b/Segno/Segno/Presentation/ViewModel/SettingsViewModel.swift
index d180bf7..6e14a3c 100644
--- a/Segno/Segno/Presentation/ViewModel/SettingsViewModel.swift
+++ b/Segno/Segno/Presentation/ViewModel/SettingsViewModel.swift
@@ -26,12 +26,8 @@ final class SettingsViewModel {
         self.changeUserNameUseCase = changeUserNameUseCase
     }
     
-    func changeNickname(to nickname: String) -> Observable<Bool> {
-        return Observable.create { emitter in
-            let result = self.changeUserNameUseCase.requestChangeNickname(to: nickname)
-            emitter.onNext(result)
-            return Disposables.create()
-        }
+    func changeNickname(to nickname: String) -> Single<Bool> {
+        return self.changeUserNameUseCase.requestChangeNickname(to: nickname)
     }
     
     func getAutoPlayMode() -> Bool {