diff --git a/src/app/(pages)/sign-in/page.tsx b/src/app/(pages)/sign-in/page.tsx
index f242f55..8330233 100644
--- a/src/app/(pages)/sign-in/page.tsx
+++ b/src/app/(pages)/sign-in/page.tsx
@@ -2,7 +2,7 @@
 
 import { SubmitHandler, useForm } from 'react-hook-form'
 
-import { SignInRequest } from '@/types/api/auth.types'
+import { SignInRequest } from '@/types/api/Auth.types'
 import { useSignInMutation } from 'queries/useSignIn'
 
 export default function LoginPage(): JSX.Element {
diff --git a/src/app/(pages)/sign-up/page.tsx b/src/app/(pages)/sign-up/page.tsx
index 779a4ea..284746d 100644
--- a/src/app/(pages)/sign-up/page.tsx
+++ b/src/app/(pages)/sign-up/page.tsx
@@ -3,7 +3,7 @@
 // import { useRouter } from 'next/navigation'
 import { SubmitHandler, useForm } from 'react-hook-form'
 
-import { SignUpRequest } from '@/types/api/auth.types'
+import { SignUpRequest } from '@/types/api/Auth.types'
 import { useSignUpMutation } from 'queries/useSignUp'
 
 export default function SignUpPage(): JSX.Element {
diff --git a/src/app/api/auth/sign-in/route.ts b/src/app/api/auth/sign-in/route.ts
index d31d11b..a2df5dd 100644
--- a/src/app/api/auth/sign-in/route.ts
+++ b/src/app/api/auth/sign-in/route.ts
@@ -1,6 +1,6 @@
 import { NextResponse } from 'next/server'
 
-import { SignInRequest, SignInResponse } from '@/types/api/auth.types'
+import { SignInRequest, SignInResponse } from '@/types/api/Auth.types'
 import { HTTPError } from 'ky'
 
 import { backendApi } from '@/services/api'
diff --git a/src/services/auth/auth.ts b/src/services/auth/auth.ts
index 5b90719..3f347f6 100644
--- a/src/services/auth/auth.ts
+++ b/src/services/auth/auth.ts
@@ -1,4 +1,4 @@
-import { SignInRequest, SignUpRequest } from '@/types/api/auth.types'
+import { SignInRequest, SignUpRequest } from '@/types/api/Auth.types'
 
 import { backendApi, proxyApi } from '@/services/api'
 
diff --git a/src/types/api/apiResponse.types.d.ts b/src/types/api/ApiResponse.types.d.ts
similarity index 100%
rename from src/types/api/apiResponse.types.d.ts
rename to src/types/api/ApiResponse.types.d.ts
diff --git a/src/types/api/apiSchema.types.d.ts b/src/types/api/ApiSchema.types.d.ts
similarity index 97%
rename from src/types/api/apiSchema.types.d.ts
rename to src/types/api/ApiSchema.types.d.ts
index 4ebf277..2fe5b09 100644
--- a/src/types/api/apiSchema.types.d.ts
+++ b/src/types/api/ApiSchema.types.d.ts
@@ -57,6 +57,23 @@ export interface paths {
     patch?: never
     trace?: never
   }
+  '/v1/my-page/check-nickname': {
+    parameters: {
+      query?: never
+      header?: never
+      path?: never
+      cookie?: never
+    }
+    get?: never
+    put?: never
+    /** 닉네임 중복 체크 */
+    post: operations['checkNicknameDuplicate']
+    delete?: never
+    options?: never
+    head?: never
+    patch?: never
+    trace?: never
+  }
   '/v1/likes': {
     parameters: {
       query?: never
@@ -797,12 +814,6 @@ export interface components {
        *       "태그4"
        *     ] */
       tags: string[]
-      /**
-       * @description 포트폴리오 이미지 url
-       * @default default_image_url
-       * @example 이미지url
-       */
-      portImageUrl: string
       /** @description 포트폴리오 링크 리스트 */
       links?: components['schemas']['LinkRequest'][]
       /** @description 포트폴리오 학력 리스트 */
@@ -1062,6 +1073,19 @@ export interface components {
       /** @description 경력 리스트 */
       careers?: components['schemas']['CareerResponse'][]
     }
+    checkNicknameRequest: {
+      /**
+       * @description 회원 닉네임
+       * @example new_nickname
+       */
+      nickname: string
+    }
+    ApiResponseBoolean: {
+      isSuccess?: boolean
+      code?: string
+      message?: string
+      result?: boolean
+    }
     LikeRequest: {
       /**
        * Format: int64
@@ -1293,12 +1317,6 @@ export interface components {
        */
       email: string
     }
-    ApiResponseBoolean: {
-      isSuccess?: boolean
-      code?: string
-      message?: string
-      result?: boolean
-    }
     ApiResponseString: {
       isSuccess?: boolean
       code?: string
@@ -1317,11 +1335,6 @@ export interface components {
        * @example 뽀꼬
        */
       nickname?: string
-      /**
-       * @description 프로필 사진 url
-       * @example aaa.com
-       */
-      imageUrl?: string
       /**
        * @description 소개문구
        * @example 간단한 소개글을 작성해보세요!
@@ -2131,6 +2144,34 @@ export interface operations {
     }
   }
   createPortfolio: {
+    parameters: {
+      query?: never
+      header?: never
+      path?: never
+      cookie?: never
+    }
+    requestBody?: {
+      content: {
+        'multipart/form-data': {
+          request: components['schemas']['PortfolioCreateRequest']
+          /** Format: binary */
+          portImage?: string
+        }
+      }
+    }
+    responses: {
+      /** @description OK */
+      200: {
+        headers: {
+          [name: string]: unknown
+        }
+        content: {
+          'application/json': components['schemas']['ApiResponsePortCreateResponse']
+        }
+      }
+    }
+  }
+  checkNicknameDuplicate: {
     parameters: {
       query?: never
       header?: never
@@ -2139,7 +2180,7 @@ export interface operations {
     }
     requestBody: {
       content: {
-        'application/json': components['schemas']['PortfolioCreateRequest']
+        'application/json': components['schemas']['checkNicknameRequest']
       }
     }
     responses: {
@@ -2149,7 +2190,7 @@ export interface operations {
           [name: string]: unknown
         }
         content: {
-          '*/*': components['schemas']['ApiResponsePortCreateResponse']
+          '*/*': components['schemas']['ApiResponseBoolean']
         }
       }
     }
@@ -2457,9 +2498,13 @@ export interface operations {
       path?: never
       cookie?: never
     }
-    requestBody: {
+    requestBody?: {
       content: {
-        'application/json': components['schemas']['ProfileUpdateRequest']
+        'multipart/form-data': {
+          request: components['schemas']['ProfileUpdateRequest']
+          /** Format: binary */
+          profileImage?: string
+        }
       }
     }
     responses: {
@@ -2469,7 +2514,7 @@ export interface operations {
           [name: string]: unknown
         }
         content: {
-          '*/*': components['schemas']['ApiResponseProfileUpdateResponse']
+          'application/json': components['schemas']['ApiResponseProfileUpdateResponse']
         }
       }
     }
@@ -2483,7 +2528,7 @@ export interface operations {
     }
     requestBody: {
       content: {
-        'application/json': components['schemas']['PasswordUpdateRequest']
+        'multipart/form-data': components['schemas']['PasswordUpdateRequest']
       }
     }
     responses: {
diff --git a/src/types/api/auth.types.d.ts b/src/types/api/Auth.types.d.ts
similarity index 79%
rename from src/types/api/auth.types.d.ts
rename to src/types/api/Auth.types.d.ts
index ec8235c..bcc7cc2 100644
--- a/src/types/api/auth.types.d.ts
+++ b/src/types/api/Auth.types.d.ts
@@ -52,20 +52,3 @@ export interface CheckEmailRequest {
   email: Email // 검사하고자 하는 이메일
 }
 export type CheckEmailResponse = boolean
-
-/*
-path: '/v1/my-page/password'
-PATCH: 마이 페이지 비밀번호 수정
-*/
-export interface PasswordUpdateRequest {
-  password: Password // 새 비밀번호
-}
-
-/*
-PasswordUpdateResponse
-{
-  "isSuccess": true,
-  "code": "COMMON200",
-  "message": "비밀번호 수정이 완료되었습니다."
-}
-*/
diff --git a/src/types/api/community.types.d.ts b/src/types/api/Community.types.d.ts
similarity index 100%
rename from src/types/api/community.types.d.ts
rename to src/types/api/Community.types.d.ts
diff --git a/src/types/api/global.types.d.ts b/src/types/api/Global.types.d.ts
similarity index 91%
rename from src/types/api/global.types.d.ts
rename to src/types/api/Global.types.d.ts
index a723f39..b22cd1d 100644
--- a/src/types/api/global.types.d.ts
+++ b/src/types/api/Global.types.d.ts
@@ -31,3 +31,9 @@ interface User {
 
 // MemberInfo: 일부 사용자 정보를 제외한 타입
 type MemberInfo = Omit<User, 'email' | 'name'>
+
+interface MultipartFormData<T> {
+  request: T
+  /** Format: binary */
+  file?: File
+}
diff --git a/src/types/api/profile.types.d.ts b/src/types/api/MyPage.types.d.ts
similarity index 53%
rename from src/types/api/profile.types.d.ts
rename to src/types/api/MyPage.types.d.ts
index 78ffddc..f3c3e0b 100644
--- a/src/types/api/profile.types.d.ts
+++ b/src/types/api/MyPage.types.d.ts
@@ -23,8 +23,44 @@ export interface GetProfileResponse extends ProfileBase, User {
 /*
 PATCH:  마이페이지 프로필 저장
 */
-export type ProfileUpdateRequest = ProfileBase
+export type ProfileUpdateRequest = MultipartFormData<ProfileBase>
 
 export interface ProfileUpdateResponse extends ProfileBase {
   completionRate?: number // 포트폴리오 완성률 (%)
 }
+
+/*
+path: '/v1/my-page/check-nickname'
+POST: 닉네임 중복 체크
+*/
+export interface CheckNicknameRequest {
+  nickname: Nickname // 닉네임 중복 검사 대상
+}
+
+export type CheckNicknameResponse = boolean
+
+/*
+PasswordUpdateResponse
+{
+  "isSuccess": true,
+  "code": "COMMON200",
+  "message": "비밀번호 수정이 완료되었습니다."
+}
+*/
+
+/*
+path: '/v1/my-page/password'
+PATCH: 마이 페이지 비밀번호 수정
+*/
+export interface PasswordUpdateRequest {
+  password: Password // 새 비밀번호
+}
+
+/*
+PasswordUpdateResponse
+{
+  "isSuccess": true,
+  "code": "COMMON200",
+  "message": "비밀번호 수정이 완료되었습니다."
+}
+*/
diff --git a/src/types/api/portfolio.types.d.ts b/src/types/api/Portfolio.types.d.ts
similarity index 95%
rename from src/types/api/portfolio.types.d.ts
rename to src/types/api/Portfolio.types.d.ts
index 81f71b5..d0e7b6f 100644
--- a/src/types/api/portfolio.types.d.ts
+++ b/src/types/api/Portfolio.types.d.ts
@@ -96,8 +96,8 @@ export interface LanguageAwardRequest extends AwardRequestBase, LanguageAward {
 // 포트폴리오 리스트 조회
 export type PortfolioListItem = PortfolioBase & PostBaseBody
 
-// 포트폴리오 생성 요청 타입
-export interface PortfolioCreateRequest extends PortfolioBase {
+// 포트폴리오 리스트 조회
+export interface PortfolioDetail extends PortfolioBase {
   portContent: string // 상세 내용
   techStacks: TechStack[] // 사용 기술 스택
   links?: PortfolioLink[] // 외부 링크
@@ -111,5 +111,8 @@ export interface PortfolioCreateRequest extends PortfolioBase {
   careers?: PortfolioCareer[] // 경력 리스트
 }
 
+// 포트폴리오 생성 요청 타입
+export type PortfolioCreateRequest = MultipartFormData<PortfolioDetail>
+
 // 포트폴리오 생성 응답 타입
 export type PortfolioCreateResponse = PortfolioCreateRequest & PostBaseBody
diff --git a/src/types/api/post.types.d.ts b/src/types/api/Post.types.d.ts
similarity index 100%
rename from src/types/api/post.types.d.ts
rename to src/types/api/Post.types.d.ts
diff --git a/src/types/api/team.types.d.ts b/src/types/api/Team.types.d.ts
similarity index 100%
rename from src/types/api/team.types.d.ts
rename to src/types/api/Team.types.d.ts
diff --git a/src/types/api/svg.d.ts b/src/types/svg.d.ts
similarity index 100%
rename from src/types/api/svg.d.ts
rename to src/types/svg.d.ts