diff --git a/http/account/AccountControllerHttpRequest.http b/http/account/AccountControllerHttpRequest.http
index b4cda30..51268ff 100644
--- a/http/account/AccountControllerHttpRequest.http
+++ b/http/account/AccountControllerHttpRequest.http
@@ -27,3 +27,8 @@ Authorization: Bearer {{access_token}}
 // @no-log
 GET {{host_url}}/api/v1/users/overviews
 Authorization: Bearer {{access_token}}
+
+### 3.5 푸시알림 설정 변경(토글)
+// @no-log
+PATCH {{host_url}}/api/v1/users/notification-allowed
+Authorization: Bearer {{access_token}}
diff --git a/src/main/java/com/daon/onjung/account/application/controller/command/AccountCommandV1Controller.java b/src/main/java/com/daon/onjung/account/application/controller/command/AccountCommandV1Controller.java
index 57bf941..0401db1 100644
--- a/src/main/java/com/daon/onjung/account/application/controller/command/AccountCommandV1Controller.java
+++ b/src/main/java/com/daon/onjung/account/application/controller/command/AccountCommandV1Controller.java
@@ -1,19 +1,26 @@
 package com.daon.onjung.account.application.controller.command;
 
 import com.daon.onjung.account.application.dto.request.CreateStoreHistoryRequestDto;
+import com.daon.onjung.account.application.dto.response.UpdateUserNotificationAllowedResponseDto;
 import com.daon.onjung.account.application.usecase.CreateStoreHistoryUseCase;
+import com.daon.onjung.account.application.usecase.UpdateUserNotificationAllowedUseCase;
+import com.daon.onjung.core.annotation.security.AccountID;
 import com.daon.onjung.core.dto.ResponseDto;
 import jakarta.validation.Valid;
 import lombok.RequiredArgsConstructor;
+import org.springframework.web.bind.annotation.PatchMapping;
 import org.springframework.web.bind.annotation.PostMapping;
 import org.springframework.web.bind.annotation.RequestBody;
 import org.springframework.web.bind.annotation.RestController;
 
+import java.util.UUID;
+
 @RestController
 @RequiredArgsConstructor
 public class AccountCommandV1Controller {
 
     private final CreateStoreHistoryUseCase createStoreHistoryUseCase;
+    private final UpdateUserNotificationAllowedUseCase updateUserNotificationAllowedUseCase;
 
     /**
      * 3.3 가게 히스토리 등록하기
@@ -25,4 +32,16 @@ public ResponseDto<Void> createStoreHistory(
         createStoreHistoryUseCase.execute(requestDto);
         return ResponseDto.ok(null);
     }
+
+    /**
+     * 3.5 푸시알림 설정 변경(토글)
+     */
+    @PatchMapping("/api/v1/users/notification-allowed")
+    public ResponseDto<UpdateUserNotificationAllowedResponseDto> updateNotificationAllowed(
+            @AccountID UUID accountId
+    ) {
+        return ResponseDto.ok(
+                updateUserNotificationAllowedUseCase.execute(accountId)
+        );
+    }
 }
diff --git a/src/main/java/com/daon/onjung/account/application/controller/query/AccountQueryV1Controller.java b/src/main/java/com/daon/onjung/account/application/controller/query/AccountQueryV1Controller.java
index b4e1b8f..003fc07 100644
--- a/src/main/java/com/daon/onjung/account/application/controller/query/AccountQueryV1Controller.java
+++ b/src/main/java/com/daon/onjung/account/application/controller/query/AccountQueryV1Controller.java
@@ -58,7 +58,7 @@ public ResponseDto<ReadStoreDetailResponseDto> readStoreDetail(
     }
 
     /**
-     * 3.3 사용자 정보 조회
+     * 3.4 사용자 정보 조회
      */
     @GetMapping("/users/overviews")
     public ResponseDto<ReadUserOverviewsResponseDto> readUserOverview(
diff --git a/src/main/java/com/daon/onjung/account/application/dto/response/UpdateUserNotificationAllowedResponseDto.java b/src/main/java/com/daon/onjung/account/application/dto/response/UpdateUserNotificationAllowedResponseDto.java
new file mode 100644
index 0000000..0916007
--- /dev/null
+++ b/src/main/java/com/daon/onjung/account/application/dto/response/UpdateUserNotificationAllowedResponseDto.java
@@ -0,0 +1,26 @@
+package com.daon.onjung.account.application.dto.response;
+
+import com.daon.onjung.account.domain.User;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import lombok.Builder;
+import lombok.Getter;
+
+@Getter
+public class UpdateUserNotificationAllowedResponseDto {
+
+    @JsonProperty("notification_allowed")
+    private final Boolean notificationAllowed;
+
+    @Builder
+    public UpdateUserNotificationAllowedResponseDto(
+            Boolean notificationAllowed
+    ) {
+        this.notificationAllowed = notificationAllowed;
+    }
+
+    public static UpdateUserNotificationAllowedResponseDto fromEntity(User user) {
+        return UpdateUserNotificationAllowedResponseDto.builder()
+                .notificationAllowed(user.getNotificationAllowed())
+                .build();
+    }
+}
diff --git a/src/main/java/com/daon/onjung/account/application/service/UpdateUserNotificationAllowedService.java b/src/main/java/com/daon/onjung/account/application/service/UpdateUserNotificationAllowedService.java
new file mode 100644
index 0000000..436818e
--- /dev/null
+++ b/src/main/java/com/daon/onjung/account/application/service/UpdateUserNotificationAllowedService.java
@@ -0,0 +1,41 @@
+package com.daon.onjung.account.application.service;
+
+import com.daon.onjung.account.application.dto.response.UpdateUserNotificationAllowedResponseDto;
+import com.daon.onjung.account.application.usecase.UpdateUserNotificationAllowedUseCase;
+import com.daon.onjung.account.domain.User;
+import com.daon.onjung.account.repository.mysql.UserRepository;
+import com.daon.onjung.core.exception.error.ErrorCode;
+import com.daon.onjung.core.exception.type.CommonException;
+import com.daon.onjung.security.domain.mysql.Account;
+import com.daon.onjung.security.domain.service.AccountService;
+import com.daon.onjung.security.repository.mysql.AccountRepository;
+import lombok.RequiredArgsConstructor;
+import org.springframework.stereotype.Service;
+import org.springframework.transaction.annotation.Transactional;
+
+import java.util.UUID;
+
+@Service
+@RequiredArgsConstructor
+public class UpdateUserNotificationAllowedService implements UpdateUserNotificationAllowedUseCase {
+
+    private final UserRepository userRepository;
+
+    private final AccountService accountService;
+    private final AccountRepository accountRepository;
+
+    @Override
+    @Transactional
+    public UpdateUserNotificationAllowedResponseDto execute(UUID accountId) {
+
+        // Account 조회
+        Account account = userRepository.findById(accountId)
+                .orElseThrow(() -> new CommonException(ErrorCode.NOT_FOUND_RESOURCE));
+
+        // Notification 허용 여부 업데이트
+        account = accountService.updateNotificationAllowed(account);
+        accountRepository.save(account);
+
+        return UpdateUserNotificationAllowedResponseDto.fromEntity((User) account);
+    }
+}
diff --git a/src/main/java/com/daon/onjung/account/application/usecase/UpdateUserNotificationAllowedUseCase.java b/src/main/java/com/daon/onjung/account/application/usecase/UpdateUserNotificationAllowedUseCase.java
new file mode 100644
index 0000000..aadf781
--- /dev/null
+++ b/src/main/java/com/daon/onjung/account/application/usecase/UpdateUserNotificationAllowedUseCase.java
@@ -0,0 +1,12 @@
+package com.daon.onjung.account.application.usecase;
+
+import com.daon.onjung.account.application.dto.response.UpdateUserNotificationAllowedResponseDto;
+import com.daon.onjung.core.annotation.bean.UseCase;
+
+import java.util.UUID;
+
+@UseCase
+public interface UpdateUserNotificationAllowedUseCase {
+
+    UpdateUserNotificationAllowedResponseDto execute(UUID accountId);
+}
diff --git a/src/main/java/com/daon/onjung/security/domain/mysql/Account.java b/src/main/java/com/daon/onjung/security/domain/mysql/Account.java
index fb2eef5..add8ee1 100644
--- a/src/main/java/com/daon/onjung/security/domain/mysql/Account.java
+++ b/src/main/java/com/daon/onjung/security/domain/mysql/Account.java
@@ -77,8 +77,8 @@ public void updateDeviceToken(String deviceToken) {
         this.deviceToken = deviceToken;
     }
 
-    public void updateNotificationAllowed(Boolean notificationAllowed) {
-        this.notificationAllowed = notificationAllowed;
+    public void updateNotificationAllowed() {
+        this.notificationAllowed = !this.notificationAllowed;
     }
 
     public abstract ESecurityRole getRole();
diff --git a/src/main/java/com/daon/onjung/security/domain/service/AccountService.java b/src/main/java/com/daon/onjung/security/domain/service/AccountService.java
index c9d0f8a..ccff6df 100644
--- a/src/main/java/com/daon/onjung/security/domain/service/AccountService.java
+++ b/src/main/java/com/daon/onjung/security/domain/service/AccountService.java
@@ -15,4 +15,9 @@ public Account updateDeviceToken(Account account, String deviceToken) {
         account.updateDeviceToken(deviceToken);
         return account;
     }
+
+    public Account updateNotificationAllowed(Account account) {
+        account.updateNotificationAllowed();
+        return account;
+    }
 }