diff --git a/dictation_server/src/features/workflows/test/utility.ts b/dictation_server/src/features/workflows/test/utility.ts
index 473f9df..a4d6ce6 100644
--- a/dictation_server/src/features/workflows/test/utility.ts
+++ b/dictation_server/src/features/workflows/test/utility.ts
@@ -37,6 +37,13 @@ export const getWorkflows = async (
   });
 };
 
+// Workflow一覧全体を取得する
+export const getAllWorkflows = async (
+  datasource: DataSource,
+): Promise<Workflow[]> => {
+  return await datasource.getRepository(Workflow).find();
+};
+
 // Workflowを取得する
 export const getWorkflow = async (
   datasource: DataSource,
diff --git a/dictation_server/src/features/workflows/workflows.controller.ts b/dictation_server/src/features/workflows/workflows.controller.ts
index c571842..46b0fa0 100644
--- a/dictation_server/src/features/workflows/workflows.controller.ts
+++ b/dictation_server/src/features/workflows/workflows.controller.ts
@@ -180,6 +180,11 @@ export class WorkflowsController {
     type: DeleteWorkflowResponse,
     description: '成功時のレスポンス',
   })
+  @ApiResponse({
+    status: HttpStatus.BAD_REQUEST,
+    description: 'パラメータ不正エラー',
+    type: ErrorResponse,
+  })
   @ApiResponse({
     status: HttpStatus.UNAUTHORIZED,
     description: '認証エラー',
@@ -207,8 +212,7 @@ export class WorkflowsController {
     const { userId } = jwt.decode(token, { json: true }) as AccessToken;
 
     const context = makeContext(userId);
-    console.log(workflowId);
-    console.log(context.trackingId);
+    await this.workflowsService.deleteWorkflow(context, userId, workflowId);
     return {};
   }
 }
diff --git a/dictation_server/src/features/workflows/workflows.service.spec.ts b/dictation_server/src/features/workflows/workflows.service.spec.ts
index 10e5714..51a3cb4 100644
--- a/dictation_server/src/features/workflows/workflows.service.spec.ts
+++ b/dictation_server/src/features/workflows/workflows.service.spec.ts
@@ -10,6 +10,7 @@ import {
   createWorkflow,
   createWorkflowTypist,
   getAllWorkflowTypists,
+  getAllWorkflows,
   getWorkflowTypists,
   getWorkflows,
 } from './test/utility';
@@ -2000,3 +2001,302 @@ describe('updateWorkflow', () => {
     }
   });
 });
+
+describe('deleteWorkflows', () => {
+  let source: DataSource = null;
+  beforeEach(async () => {
+    source = new DataSource({
+      type: 'sqlite',
+      database: ':memory:',
+      logging: false,
+      entities: [__dirname + '/../../**/*.entity{.ts,.js}'],
+      synchronize: true, // trueにすると自動的にmigrationが行われるため注意
+    });
+    return source.initialize();
+  });
+  afterEach(async () => {
+    await source.destroy();
+    source = null;
+  });
+
+  it('アカウント内のWorkflowを削除できる', async () => {
+    const module = await makeTestingModule(source);
+    // 第五階層のアカウント作成
+    const { account, admin } = await makeTestAccount(source, { tier: 5 });
+    const { id: authorId } = await makeTestUser(source, {
+      external_id: 'author1',
+      author_id: 'AUTHOR1',
+      account_id: account.id,
+      role: USER_ROLES.AUTHOR,
+    });
+    const { id: typistId } = await makeTestUser(source, {
+      external_id: 'typist1',
+      account_id: account.id,
+      role: USER_ROLES.TYPIST,
+    });
+
+    const workflow = await createWorkflow(
+      source,
+      account.id,
+      authorId,
+      undefined,
+      undefined,
+    );
+    await createWorkflowTypist(source, workflow.id, typistId);
+
+    //作成したデータを確認
+    {
+      const workflows = await getWorkflows(source, account.id);
+      const workflowTypists = await getAllWorkflowTypists(source);
+      expect(workflows.length).toBe(1);
+      expect(workflowTypists.length).toBe(1);
+    }
+
+    const service = module.get<WorkflowsService>(WorkflowsService);
+    const context = makeContext(admin.external_id);
+
+    await service.deleteWorkflow(context, admin.external_id, workflow.id);
+
+    //実行結果を確認
+    {
+      const workflows = await getWorkflows(source, account.id);
+      const workflowTypists = await getAllWorkflowTypists(source);
+      expect(workflows.length).toBe(0);
+      expect(workflowTypists.length).toBe(0);
+    }
+  });
+
+  it('アカウント内のWorkflowを削除できる（複数ワークフローがある場合）', async () => {
+    const module = await makeTestingModule(source);
+    // 第五階層のアカウント作成
+    const { account, admin } = await makeTestAccount(source, { tier: 5 });
+    const { id: authorId1 } = await makeTestUser(source, {
+      external_id: 'author1',
+      author_id: 'AUTHOR1',
+      account_id: account.id,
+      role: USER_ROLES.AUTHOR,
+    });
+    const { id: authorId2 } = await makeTestUser(source, {
+      external_id: 'author2',
+      author_id: 'AUTHOR2',
+      account_id: account.id,
+      role: USER_ROLES.AUTHOR,
+    });
+    const { id: typistId } = await makeTestUser(source, {
+      external_id: 'typist1',
+      account_id: account.id,
+      role: USER_ROLES.TYPIST,
+    });
+
+    const workflow1 = await createWorkflow(source, account.id, authorId1);
+    await createWorkflowTypist(source, workflow1.id, typistId);
+    const workflow2 = await createWorkflow(source, account.id, authorId2);
+    await createWorkflowTypist(source, workflow2.id, typistId);
+
+    //作成したデータを確認
+    {
+      const workflows = await getAllWorkflows(source);
+      const workflowTypists = await getAllWorkflowTypists(source);
+      expect(workflows.length).toBe(2);
+      expect(workflowTypists.length).toBe(2);
+    }
+
+    const service = module.get<WorkflowsService>(WorkflowsService);
+    const context = makeContext(admin.external_id);
+
+    await service.deleteWorkflow(context, admin.external_id, workflow1.id);
+
+    //実行結果を確認
+    {
+      const workflows = await getAllWorkflows(source);
+      const workflowTypists = await getAllWorkflowTypists(source);
+      expect(workflows.length).toBe(1);
+      expect(workflows[0].id).toBe(workflow2.id);
+      expect(workflowTypists.length).toBe(1);
+      expect(workflowTypists[0].workflow_id).toBe(workflow2.id);
+    }
+  });
+
+  it('指定されたワークフローが存在しない場合、400エラーを返却する', async () => {
+    const module = await makeTestingModule(source);
+    // 第五階層のアカウント作成
+    const { account, admin } = await makeTestAccount(source, { tier: 5 });
+    const { id: authorId } = await makeTestUser(source, {
+      external_id: 'author1',
+      author_id: 'AUTHOR1',
+      account_id: account.id,
+      role: USER_ROLES.AUTHOR,
+    });
+    const { id: typistId } = await makeTestUser(source, {
+      external_id: 'typist1',
+      account_id: account.id,
+      role: USER_ROLES.TYPIST,
+    });
+
+    const workflow = await createWorkflow(
+      source,
+      account.id,
+      authorId,
+      undefined,
+      undefined,
+    );
+    await createWorkflowTypist(source, workflow.id, typistId);
+
+    //作成したデータを確認
+    {
+      const workflows = await getWorkflows(source, account.id);
+      const workflowTypists = await getAllWorkflowTypists(source);
+      expect(workflows.length).toBe(1);
+      expect(workflowTypists.length).toBe(1);
+    }
+
+    const service = module.get<WorkflowsService>(WorkflowsService);
+    const context = makeContext(admin.external_id);
+
+    //実行結果を確認
+    try {
+      await service.deleteWorkflow(context, admin.external_id, 9999);
+    } catch (e) {
+      if (e instanceof HttpException) {
+        expect(e.getStatus()).toEqual(HttpStatus.BAD_REQUEST);
+        expect(e.getResponse()).toEqual(makeErrorResponse('E013002'));
+      } else {
+        fail();
+      }
+    }
+  });
+
+  it('指定されたワークフローが存在しない場合、400エラーを返却する（ログインユーザーのアカウント外）', async () => {
+    const module = await makeTestingModule(source);
+    // 第五階層のアカウント作成
+    const { account, admin } = await makeTestAccount(source, { tier: 5 });
+    const { id: authorId } = await makeTestUser(source, {
+      external_id: 'author1',
+      author_id: 'AUTHOR1',
+      account_id: account.id,
+      role: USER_ROLES.AUTHOR,
+    });
+    const { id: typistId } = await makeTestUser(source, {
+      external_id: 'typist1',
+      account_id: account.id,
+      role: USER_ROLES.TYPIST,
+    });
+
+    const workflow = await createWorkflow(
+      source,
+      account.id,
+      authorId,
+      undefined,
+      undefined,
+    );
+    await createWorkflowTypist(source, workflow.id, typistId);
+
+    const { account: otherAccount } = await makeTestAccount(source, {
+      tier: 5,
+    });
+    const { id: otherAauthorId } = await makeTestUser(source, {
+      external_id: 'author1',
+      author_id: 'AUTHOR1',
+      account_id: otherAccount.id,
+      role: USER_ROLES.AUTHOR,
+    });
+    const { id: otherTypistId } = await makeTestUser(source, {
+      external_id: 'typist1',
+      account_id: otherAccount.id,
+      role: USER_ROLES.TYPIST,
+    });
+
+    const otherWorkflow = await createWorkflow(
+      source,
+      otherAccount.id,
+      otherAauthorId,
+      undefined,
+      undefined,
+    );
+    await createWorkflowTypist(source, otherWorkflow.id, otherTypistId);
+
+    //作成したデータを確認
+    {
+      const workflows = await getAllWorkflows(source);
+      const workflowTypists = await getAllWorkflowTypists(source);
+      expect(workflows.length).toBe(2);
+      expect(workflowTypists.length).toBe(2);
+    }
+
+    const service = module.get<WorkflowsService>(WorkflowsService);
+    const context = makeContext(admin.external_id);
+
+    //実行結果を確認
+    try {
+      await service.deleteWorkflow(
+        context,
+        admin.external_id,
+        otherWorkflow.id,
+      );
+    } catch (e) {
+      if (e instanceof HttpException) {
+        expect(e.getStatus()).toEqual(HttpStatus.BAD_REQUEST);
+        expect(e.getResponse()).toEqual(makeErrorResponse('E013002'));
+      } else {
+        fail();
+      }
+    }
+  });
+
+  it('DBアクセスに失敗した場合、500エラーを返却する', async () => {
+    const module = await makeTestingModule(source);
+    // 第五階層のアカウント作成
+    const { account, admin } = await makeTestAccount(source, { tier: 5 });
+    const { id: authorId } = await makeTestUser(source, {
+      external_id: 'author1',
+      author_id: 'AUTHOR1',
+      account_id: account.id,
+      role: USER_ROLES.AUTHOR,
+    });
+    const { id: typistId } = await makeTestUser(source, {
+      external_id: 'typist1',
+      account_id: account.id,
+      role: USER_ROLES.TYPIST,
+    });
+
+    const workflow = await createWorkflow(
+      source,
+      account.id,
+      authorId,
+      undefined,
+      undefined,
+    );
+    await createWorkflowTypist(source, workflow.id, typistId);
+
+    //作成したデータを確認
+    {
+      const workflows = await getWorkflows(source, account.id);
+      const workflowTypists = await getAllWorkflowTypists(source);
+      expect(workflows.length).toBe(1);
+      expect(workflowTypists.length).toBe(1);
+    }
+
+    const service = module.get<WorkflowsService>(WorkflowsService);
+    const context = makeContext(admin.external_id);
+
+    //DBアクセスに失敗するようにする
+    const workflowsRepositoryService = module.get<WorkflowsRepositoryService>(
+      WorkflowsRepositoryService,
+    );
+    workflowsRepositoryService.deleteWorkflow = jest
+      .fn()
+      .mockRejectedValue('DB failed');
+
+    //実行結果を確認
+    try {
+      await service.deleteWorkflow(context, admin.external_id, workflow.id);
+    } catch (e) {
+      if (e instanceof HttpException) {
+        expect(e.getStatus()).toEqual(HttpStatus.INTERNAL_SERVER_ERROR);
+        expect(e.getResponse()).toEqual(makeErrorResponse('E009999'));
+      } else {
+        fail();
+      }
+    }
+  });
+});
diff --git a/dictation_server/src/features/workflows/workflows.service.ts b/dictation_server/src/features/workflows/workflows.service.ts
index 288629a..de23f5f 100644
--- a/dictation_server/src/features/workflows/workflows.service.ts
+++ b/dictation_server/src/features/workflows/workflows.service.ts
@@ -11,8 +11,9 @@ import { WorktypeIdNotFoundError } from '../../repositories/worktypes/errors/typ
 import { TemplateFileNotExistError } from '../../repositories/template_files/errors/types';
 import {
   AuthorIdAndWorktypeIdPairAlreadyExistsError,
-  WorkflowIdNotFoundError,
+  WorkflowNotFoundError,
 } from '../../repositories/workflows/errors/types';
+import { AccountNotFoundError } from '../../repositories/accounts/errors/types';
 
 @Injectable()
 export class WorkflowsService {
@@ -243,7 +244,7 @@ export class WorkflowsService {
       this.logger.error(`[${context.trackingId}] error=${e}`);
       if (e instanceof Error) {
         switch (e.constructor) {
-          case WorkflowIdNotFoundError:
+          case WorkflowNotFoundError:
             throw new HttpException(
               makeErrorResponse('E013002'),
               HttpStatus.BAD_REQUEST,
@@ -290,4 +291,70 @@ export class WorkflowsService {
       );
     }
   }
+
+  /**
+   * ワークフローを削除する
+   * @param context
+   * @param externalId
+   * @param workflowId
+   * @returns workflow
+   */
+  async deleteWorkflow(
+    context: Context,
+    externalId: string,
+    workflowId: number,
+  ): Promise<void> {
+    this.logger.log(
+      `[IN] [${context.trackingId}] ${this.deleteWorkflow.name} |  | params: { ` +
+        `externalId: ${externalId}, ` +
+        `workflowId: ${workflowId} };`,
+    );
+    try {
+      const { account } = await this.usersRepository.findUserByExternalId(
+        externalId,
+      );
+
+      if (!account) {
+        throw new AccountNotFoundError(
+          `account not found. externalId: ${externalId}`,
+        );
+      }
+
+      await this.workflowsRepository.deleteWorkflow(account.id, workflowId);
+    } catch (e) {
+      this.logger.error(`[${context.trackingId}] error=${e}`);
+      if (e instanceof Error) {
+        switch (e.constructor) {
+          case UserNotFoundError:
+            throw new HttpException(
+              makeErrorResponse('E010204'),
+              HttpStatus.BAD_REQUEST,
+            );
+          case AccountNotFoundError:
+            throw new HttpException(
+              makeErrorResponse('E010501'),
+              HttpStatus.BAD_REQUEST,
+            );
+          case WorkflowNotFoundError:
+            throw new HttpException(
+              makeErrorResponse('E013002'),
+              HttpStatus.BAD_REQUEST,
+            );
+          default:
+            throw new HttpException(
+              makeErrorResponse('E009999'),
+              HttpStatus.INTERNAL_SERVER_ERROR,
+            );
+        }
+      }
+      throw new HttpException(
+        makeErrorResponse('E009999'),
+        HttpStatus.INTERNAL_SERVER_ERROR,
+      );
+    } finally {
+      this.logger.log(
+        `[OUT] [${context.trackingId}] ${this.deleteWorkflow.name}`,
+      );
+    }
+  }
 }
diff --git a/dictation_server/src/repositories/workflows/errors/types.ts b/dictation_server/src/repositories/workflows/errors/types.ts
index 8680e30..633bc00 100644
--- a/dictation_server/src/repositories/workflows/errors/types.ts
+++ b/dictation_server/src/repositories/workflows/errors/types.ts
@@ -1,4 +1,4 @@
 // AuthorIDとWorktypeIDのペア重複エラー
 export class AuthorIdAndWorktypeIdPairAlreadyExistsError extends Error {}
-// WorkflowID存在エラー
-export class WorkflowIdNotFoundError extends Error {}
+// Workflow存在エラー
+export class WorkflowNotFoundError extends Error {}
diff --git a/dictation_server/src/repositories/workflows/workflows.repository.service.ts b/dictation_server/src/repositories/workflows/workflows.repository.service.ts
index 0437d79..f658dcd 100644
--- a/dictation_server/src/repositories/workflows/workflows.repository.service.ts
+++ b/dictation_server/src/repositories/workflows/workflows.repository.service.ts
@@ -13,7 +13,7 @@ import { WorktypeIdNotFoundError } from '../worktypes/errors/types';
 import { TemplateFileNotExistError } from '../template_files/errors/types';
 import {
   AuthorIdAndWorktypeIdPairAlreadyExistsError,
-  WorkflowIdNotFoundError,
+  WorkflowNotFoundError,
 } from './errors/types';
 
 @Injectable()
@@ -190,7 +190,7 @@ export class WorkflowsRepositoryService {
         where: { account_id: accountId, id: workflowId },
       });
       if (!targetWorkflow) {
-        throw new WorkflowIdNotFoundError(
+        throw new WorkflowNotFoundError(
           `workflow not found. id: ${workflowId}`,
         );
       }
@@ -300,6 +300,32 @@ export class WorkflowsRepositoryService {
     });
   }
 
+  /**
+   * ワークフローを削除する
+   * @param accountId
+   * @param workflowId
+   * @returns workflow
+   */
+  async deleteWorkflow(accountId: number, workflowId: number): Promise<void> {
+    return await this.dataSource.transaction(async (entityManager) => {
+      const workflowRepo = entityManager.getRepository(Workflow);
+      const workflowTypistsRepo = entityManager.getRepository(DbWorkflowTypist);
+
+      // ワークフローの存在確認
+      const workflow = await workflowRepo.findOne({
+        where: { account_id: accountId, id: workflowId },
+      });
+      if (!workflow) {
+        throw new WorkflowNotFoundError(
+          `workflow not found. id: ${workflowId}`,
+        );
+      }
+
+      await workflowTypistsRepo.delete({ workflow_id: workflowId });
+      await workflowRepo.delete(workflowId);
+    });
+  }
+
   /**
    * DBに保存するワークフローデータを作成する
    * @param accountId