diff --git a/dictation_client/src/features/user/constants.ts b/dictation_client/src/features/user/constants.ts
index 320e99e..bc46f87 100644
--- a/dictation_client/src/features/user/constants.ts
+++ b/dictation_client/src/features/user/constants.ts
@@ -1,7 +1,7 @@
 export const ROLE = {
-  AUTHOR: "Author",
-  TYPIST: "Transcriptionist",
-  NONE: "None",
+  AUTHOR: "author",
+  TYPIST: "typist",
+  NONE: "none",
 } as const;
 
 export type RoleType = typeof ROLE[keyof typeof ROLE];
diff --git a/dictation_client/src/pages/UserListPage/popup.tsx b/dictation_client/src/pages/UserListPage/popup.tsx
index 45fd300..557ba94 100644
--- a/dictation_client/src/pages/UserListPage/popup.tsx
+++ b/dictation_client/src/pages/UserListPage/popup.tsx
@@ -199,14 +199,14 @@ export const UserAddPopup: React.FC<UserAddPopupProps> = (props) => {
                 />
                 {t(getTranslationID("userListPage.label.transcriptionist"))}
               </label>
-              <label htmlFor="None">
+              <label htmlFor={ROLE.NONE}>
                 <input
                   type="radio"
                   name="role"
                   className={styles.formRadio}
-                  checked={role === "None"}
+                  checked={role === ROLE.NONE}
                   onChange={() => {
-                    dispatch(changeRole({ role: "None" }));
+                    dispatch(changeRole({ role: ROLE.NONE }));
                   }}
                 />
                 {t(getTranslationID("userListPage.label.none"))}
diff --git a/dictation_server/src/common/error/code.ts b/dictation_server/src/common/error/code.ts
index 8d68836..c430e3f 100644
--- a/dictation_server/src/common/error/code.ts
+++ b/dictation_server/src/common/error/code.ts
@@ -27,6 +27,7 @@ export const ErrorCodes = [
   'E010202', // 認証済ユーザエラー
   'E010203', // 管理ユーザ権限エラー
   'E010204', // ユーザ不在エラー
+  'E010205', // DBのRoleが想定外の値エラー
   'E010301', // メールアドレス登録済みエラー
   'E010302', // authorId重複エラー
   'E010401', // PONumber重複エラー
diff --git a/dictation_server/src/common/error/message.ts b/dictation_server/src/common/error/message.ts
index 96e8c25..060dabe 100644
--- a/dictation_server/src/common/error/message.ts
+++ b/dictation_server/src/common/error/message.ts
@@ -16,6 +16,7 @@ export const errors: Errors = {
   E010202: 'Email already verified user Error.',
   E010203: 'Administrator Permissions Error.',
   E010204: 'User not Found Error.',
+  E010205: 'Role from DB is unexpected value Error.',
   E010301: 'This email user already created Error',
   E010302: 'This AuthorId already used Error',
   E010401: 'This PoNumber already used Error',
diff --git a/dictation_server/src/constants/index.ts b/dictation_server/src/constants/index.ts
index 134d4fb..19d6bb6 100644
--- a/dictation_server/src/constants/index.ts
+++ b/dictation_server/src/constants/index.ts
@@ -83,10 +83,23 @@ export const BLOB_STORAGE_REGION_EU = [
 ];
 
 /**
- * ロールNone
- * @const {string}
+ * 管理ロール
+ * @const {string[]}
  */
-export const ROLE_NONE = 'None';
+export const ADMIN_ROLES = {
+  ADMIN: 'admin',
+  STANDARD: 'standard',
+} as const;
+
+/**
+ * ロール
+ * @const {string[]}
+ */
+export const USER_ROLES = {
+  NONE: 'none',
+  AUTHOR: 'author',
+  TYPIST: 'typist',
+} as const;
 
 /**
  * ライセンス注文ステータス（発行待ち）
diff --git a/dictation_server/src/features/accounts/accounts.controller.ts b/dictation_server/src/features/accounts/accounts.controller.ts
index 4158e81..b2f359c 100644
--- a/dictation_server/src/features/accounts/accounts.controller.ts
+++ b/dictation_server/src/features/accounts/accounts.controller.ts
@@ -3,7 +3,7 @@ import { ApiOperation, ApiResponse, ApiTags } from '@nestjs/swagger';
 import { ErrorResponse } from '../../common/error/types/types';
 import { AccountsService } from './accounts.service';
 import { CreateAccountRequest, CreateAccountResponse } from './types/types';
-import { ROLE_NONE } from '../../constants';
+import { USER_ROLES } from '../../constants';
 
 @ApiTags('accounts')
 @Controller('accounts')
@@ -39,7 +39,7 @@ export class AccountsController {
       adminName,
       acceptedTermsVersion,
     } = body;
-    const role = ROLE_NONE;
+    const role = USER_ROLES.NONE;
 
     await this.accountService.createAccount(
       companyName,
diff --git a/dictation_server/src/features/auth/auth.service.ts b/dictation_server/src/features/auth/auth.service.ts
index 12eae50..9657ac0 100644
--- a/dictation_server/src/features/auth/auth.service.ts
+++ b/dictation_server/src/features/auth/auth.service.ts
@@ -13,6 +13,7 @@ import {
 import { AdB2cService } from '../../gateways/adb2c/adb2c.service';
 import { CryptoService } from '../../gateways/crypto/crypto.service';
 import { User } from '../../repositories/users/entity/user.entity';
+import { ADMIN_ROLES, USER_ROLES } from '../../constants';
 
 @Injectable()
 export class AuthService {
@@ -76,14 +77,33 @@ export class AuthService {
 
     const privateKey = await this.cryptoService.getPrivateKey();
 
+    // ユーザーのロールを設定
+    // 万一不正なRoleが登録されていた場合、そのままDBの値を使用すると不正なロールのリフレッシュトークンが発行されるため、
+    // ロールの設定値はDBに保存したRoleの値を直接トークンに入れないように定数で設定する
+    // ※none/author/typist以外はロールに設定されない
+    let role = '';
+    if (user.role === USER_ROLES.NONE) {
+      role = USER_ROLES.NONE;
+    } else if (user.role === USER_ROLES.AUTHOR) {
+      role = USER_ROLES.AUTHOR;
+    } else if (user.role === USER_ROLES.TYPIST) {
+      role = USER_ROLES.TYPIST;
+    } else {
+      this.logger.error(`Role from DB is unexpected value. role=${user.role}`);
+      throw new HttpException(
+        makeErrorResponse('E010205'),
+        HttpStatus.INTERNAL_SERVER_ERROR,
+      );
+    }
+
     const token = sign<RefreshToken>(
       {
         //ユーザーの属しているアカウントの管理者にユーザーが設定されていればadminをセットする
-        role: `${user.role} ${
+        role: `${role} ${
           user.account.primary_admin_user_id === user.id ||
           user.account.secondary_admin_user_id === user.id
-            ? 'admin'
-            : 'standard'
+            ? ADMIN_ROLES.ADMIN
+            : ADMIN_ROLES.STANDARD
         }`,
         userId: idToken.sub,
       },
diff --git a/dictation_server/src/features/users/types/types.ts b/dictation_server/src/features/users/types/types.ts
index 6d6116f..a960eba 100644
--- a/dictation_server/src/features/users/types/types.ts
+++ b/dictation_server/src/features/users/types/types.ts
@@ -1,4 +1,6 @@
 import { ApiProperty } from '@nestjs/swagger';
+import { IsIn } from 'class-validator';
+import { USER_ROLES } from '../../../constants';
 
 export class ConfirmRequest {
   @ApiProperty()
@@ -46,6 +48,7 @@ export class SignupRequest {
   name: string;
 
   @ApiProperty({ description: 'none/author/typist' })
+  @IsIn([USER_ROLES.NONE, USER_ROLES.AUTHOR, USER_ROLES.TYPIST])
   role: string;
 
   @ApiProperty({ required: false })