diff --git a/frontend/components/member/FormCreate.vue b/frontend/components/member/FormCreate.vue
index 218173e5..4e4b0986 100644
--- a/frontend/components/member/FormCreate.vue
+++ b/frontend/components/member/FormCreate.vue
@@ -56,9 +56,9 @@ import { mdiAccount, mdiCreditCardOutline } from '@mdi/js'
 import type { PropType } from 'vue'
 import Vue from 'vue'
 import BaseCard from '@/components/utils/BaseCard.vue'
+import { MemberItem } from '~/domain/models/member/member'
 import { RoleItem } from '~/domain/models/role/role'
 import { UserItem } from '~/domain/models/user/user'
-import { MemberDTO } from '~/services/application/member/memberData'
 
 export default Vue.extend({
   components: {
@@ -67,7 +67,7 @@ export default Vue.extend({
 
   props: {
     value: {
-      type: Object as PropType<MemberDTO>,
+      type: Object as PropType<MemberItem>,
       required: true
     },
     errorMessage: {
@@ -108,7 +108,7 @@ export default Vue.extend({
           isSuperuser: false
         }
       },
-      set(val: MemberDTO) {
+      set(val: MemberItem) {
         if (val === undefined) return
         const user = { user: val.id, username: val.username }
         this.$emit('input', { ...this.value, ...user })
diff --git a/frontend/domain/models/member/memberRepository.ts b/frontend/domain/models/member/memberRepository.ts
deleted file mode 100644
index 30813116..00000000
--- a/frontend/domain/models/member/memberRepository.ts
+++ /dev/null
@@ -1,13 +0,0 @@
-import { MemberItem } from '~/domain/models/member/member'
-
-export interface MemberRepository {
-  list(projectId: string): Promise<MemberItem[]>
-
-  create(projectId: string, item: MemberItem): Promise<MemberItem>
-
-  update(projectId: string, item: MemberItem): Promise<MemberItem>
-
-  bulkDelete(projectId: string, memberIds: number[]): Promise<void>
-
-  fetchMyRole(projectId: string): Promise<MemberItem>
-}
diff --git a/frontend/layouts/project.vue b/frontend/layouts/project.vue
index 79709d19..84e95fd1 100644
--- a/frontend/layouts/project.vue
+++ b/frontend/layouts/project.vue
@@ -46,7 +46,8 @@ export default {
   },
 
   async created() {
-    this.isProjectAdmin = await this.$services.member.isProjectAdmin(this.$route.params.id)
+    const member = await this.$repositories.member.fetchMyRole(this.$route.params.id)
+    this.isProjectAdmin = member.isProjectAdmin
   }
 }
 </script>
diff --git a/frontend/layouts/workspace.vue b/frontend/layouts/workspace.vue
index 5c96c34d..dae6c610 100644
--- a/frontend/layouts/workspace.vue
+++ b/frontend/layouts/workspace.vue
@@ -46,7 +46,8 @@ export default {
   },
 
   async created() {
-    this.isProjectAdmin = await this.$services.member.isProjectAdmin(this.$route.params.id)
+    const member = await this.$repositories.member.fetchMyRole(this.$route.params.id)
+    this.isProjectAdmin = member.isProjectAdmin
   }
 }
 </script>
diff --git a/frontend/middleware/check-admin.js b/frontend/middleware/check-admin.js
index 29b647e5..b8d521bb 100644
--- a/frontend/middleware/check-admin.js
+++ b/frontend/middleware/check-admin.js
@@ -6,11 +6,11 @@ export default _.debounce(async function ({ app, store, route, redirect }) {
   } catch (e) {
     redirect('/projects')
   }
-  const isProjectAdmin = await app.$services.member.isProjectAdmin(route.params.id)
+  const member = await app.$repositories.member.fetchMyRole(route.params.id)
   const projectRoot = app.localePath('/projects/' + route.params.id)
   const path = route.fullPath.replace(/\/$/g, '')
 
-  if (isProjectAdmin || path === projectRoot || path.startsWith(projectRoot + '/dataset')) {
+  if (member.isProjectAdmin || path === projectRoot || path.startsWith(projectRoot + '/dataset')) {
     return
   }
 
diff --git a/frontend/pages/projects/_id/dataset/index.vue b/frontend/pages/projects/_id/dataset/index.vue
index 476050ff..e04a76a3 100644
--- a/frontend/pages/projects/_id/dataset/index.vue
+++ b/frontend/pages/projects/_id/dataset/index.vue
@@ -144,7 +144,8 @@ export default Vue.extend({
 
   async created() {
     this.project = await this.$services.project.findById(this.projectId)
-    this.isProjectAdmin = await this.$services.member.isProjectAdmin(this.projectId)
+    const member = await this.$repositories.member.fetchMyRole(this.projectId)
+    this.isProjectAdmin = member.isProjectAdmin
   },
 
   methods: {
diff --git a/frontend/pages/projects/_id/members/index.vue b/frontend/pages/projects/_id/members/index.vue
index f34b1da4..97b59723 100644
--- a/frontend/pages/projects/_id/members/index.vue
+++ b/frontend/pages/projects/_id/members/index.vue
@@ -33,7 +33,7 @@ import Vue from 'vue'
 import FormDelete from '@/components/member/FormDelete.vue'
 import MemberList from '@/components/member/MemberList.vue'
 import FormCreate from '~/components/member/FormCreate.vue'
-import { MemberDTO } from '~/services/application/member/memberData'
+import { MemberItem } from '~/domain/models/member/member'
 
 export default Vue.extend({
   components: {
@@ -57,15 +57,15 @@ export default Vue.extend({
         role: -1,
         username: '',
         rolename: 'annotator'
-      } as MemberDTO,
+      } as MemberItem,
       defaultItem: {
         user: -1,
         role: -1,
         username: '',
         rolename: 'annotator'
-      } as MemberDTO,
-      items: [] as MemberDTO[],
-      selected: [] as MemberDTO[],
+      } as MemberItem,
+      items: [] as MemberItem[],
+      selected: [] as MemberItem[],
       isLoading: false,
       errorMessage: ''
     }
@@ -74,7 +74,7 @@ export default Vue.extend({
   async fetch() {
     this.isLoading = true
     try {
-      this.items = await this.$services.member.list(this.projectId)
+      this.items = await this.$repositories.member.list(this.projectId)
     } catch (e) {
       this.$router.push(`/projects/${this.projectId}`)
     } finally {
@@ -94,21 +94,21 @@ export default Vue.extend({
   methods: {
     async create() {
       try {
-        await this.$services.member.create(this.projectId, this.editedItem)
+        await this.$repositories.member.create(this.projectId, this.editedItem)
         this.close()
         this.$fetch()
       } catch (e: any) {
-        this.errorMessage = e.message
+        this.errorMessage = e.response.data.detail
       }
     },
 
     async update() {
       try {
-        await this.$services.member.update(this.projectId, this.editedItem)
+        await this.$repositories.member.update(this.projectId, this.editedItem)
         this.close()
         this.$fetch()
       } catch (e: any) {
-        this.errorMessage = e.message
+        this.errorMessage = e.response.data.detail
       }
     },
 
@@ -130,13 +130,13 @@ export default Vue.extend({
     },
 
     async remove() {
-      await this.$services.member.bulkDelete(this.projectId, this.selected)
+      await this.$repositories.member.bulkDelete(this.projectId, this.selected)
       this.$fetch()
       this.dialogDelete = false
       this.selected = []
     },
 
-    editItem(item: MemberDTO) {
+    editItem(item: MemberItem) {
       this.editedIndex = this.items.indexOf(item)
       this.editedItem = Object.assign({}, item)
       this.dialogCreate = true
diff --git a/frontend/plugins/services.ts b/frontend/plugins/services.ts
index 9dd67a99..76b51fda 100644
--- a/frontend/plugins/services.ts
+++ b/frontend/plugins/services.ts
@@ -3,7 +3,6 @@ import { repositories } from './repositories'
 import { ConfigApplicationService } from '@/services/application/autoLabeling/configApplicationService'
 import { ExampleApplicationService } from '@/services/application/example/exampleApplicationService'
 import { LabelApplicationService } from '@/services/application/label/labelApplicationService'
-import { MemberApplicationService } from '@/services/application/member/memberApplicationService'
 import { OptionApplicationService } from '@/services/application/option/optionApplicationService'
 import { ProjectApplicationService } from '@/services/application/project/projectApplicationService'
 import { TagApplicationService } from '@/services/application/tag/tagApplicationService'
@@ -17,7 +16,6 @@ export interface Services {
   categoryType: LabelApplicationService
   spanType: LabelApplicationService
   relationType: LabelApplicationService
-  member: MemberApplicationService
   project: ProjectApplicationService
   example: ExampleApplicationService
   textClassification: TextClassificationService
@@ -41,7 +39,6 @@ const plugin: Plugin = (_, inject) => {
     categoryType: new LabelApplicationService(repositories.categoryType),
     spanType: new LabelApplicationService(repositories.spanType),
     relationType: new LabelApplicationService(repositories.relationType),
-    member: new MemberApplicationService(repositories.member),
     project: new ProjectApplicationService(repositories.project),
     example: new ExampleApplicationService(repositories.example),
     textClassification: new TextClassificationService(repositories.category),
diff --git a/frontend/repositories/member/apiMemberRepository.ts b/frontend/repositories/member/apiMemberRepository.ts
index 7972511c..76c2f93a 100644
--- a/frontend/repositories/member/apiMemberRepository.ts
+++ b/frontend/repositories/member/apiMemberRepository.ts
@@ -1,6 +1,5 @@
-import ApiService from '@/services/api.service'
-import { MemberRepository } from '@/domain/models/member/memberRepository'
 import { MemberItem } from '@/domain/models/member/member'
+import ApiService from '@/services/api.service'
 
 function toModel(item: { [key: string]: any }): MemberItem {
   return new MemberItem(item.id, item.user, item.role, item.username, item.rolename)
@@ -16,7 +15,7 @@ function toPayload(item: MemberItem): { [key: string]: any } {
   }
 }
 
-export class APIMemberRepository implements MemberRepository {
+export class APIMemberRepository {
   constructor(private readonly request = ApiService) {}
 
   async list(projectId: string): Promise<MemberItem[]> {
@@ -39,9 +38,10 @@ export class APIMemberRepository implements MemberRepository {
     return toModel(response.data)
   }
 
-  async bulkDelete(projectId: string, memberIds: number[]): Promise<void> {
+  async bulkDelete(projectId: string, members: MemberItem[]): Promise<void> {
     const url = `/projects/${projectId}/members`
-    await this.request.delete(url, { ids: memberIds })
+    const ids = members.map((member) => member.id)
+    await this.request.delete(url, { ids })
   }
 
   async fetchMyRole(projectId: string): Promise<MemberItem> {
diff --git a/frontend/services/application/member/memberApplicationService.ts b/frontend/services/application/member/memberApplicationService.ts
deleted file mode 100644
index 3ff225d9..00000000
--- a/frontend/services/application/member/memberApplicationService.ts
+++ /dev/null
@@ -1,45 +0,0 @@
-import { plainToInstance } from 'class-transformer'
-import { MemberDTO } from './memberData'
-import { MemberRepository } from '~/domain/models/member/memberRepository'
-import { MemberItem } from '~/domain/models/member/member'
-
-export class MemberApplicationService {
-  constructor(private readonly repository: MemberRepository) {}
-
-  public async list(id: string): Promise<MemberDTO[]> {
-    try {
-      const items = await this.repository.list(id)
-      return items.map((item) => new MemberDTO(item))
-    } catch (e: any) {
-      throw new Error(e.response.data.detail)
-    }
-  }
-
-  public async create(projectId: string, item: MemberDTO): Promise<void> {
-    try {
-      const member = plainToInstance(MemberItem, item)
-      await this.repository.create(projectId, member)
-    } catch (e: any) {
-      throw new Error(e.response.data.detail)
-    }
-  }
-
-  public async update(projectId: string, item: MemberDTO): Promise<void> {
-    try {
-      const member = plainToInstance(MemberItem, item)
-      await this.repository.update(projectId, member)
-    } catch (e: any) {
-      throw new Error(e.response.data.detail)
-    }
-  }
-
-  public bulkDelete(projectId: string, items: MemberDTO[]): Promise<void> {
-    const ids = items.map((item) => item.id)
-    return this.repository.bulkDelete(projectId, ids)
-  }
-
-  public async isProjectAdmin(projectId: string): Promise<boolean> {
-    const item = await this.repository.fetchMyRole(projectId)
-    return item.isProjectAdmin
-  }
-}
diff --git a/frontend/services/application/member/memberData.ts b/frontend/services/application/member/memberData.ts
deleted file mode 100644
index 70dbb826..00000000
--- a/frontend/services/application/member/memberData.ts
+++ /dev/null
@@ -1,17 +0,0 @@
-import { MemberItem } from '~/domain/models/member/member'
-import { RoleName } from '~/domain/models/role/role'
-export class MemberDTO {
-  id: number
-  user: number
-  role: number
-  username: string
-  rolename: RoleName
-
-  constructor(item: MemberItem) {
-    this.id = item.id
-    this.user = item.user
-    this.role = item.role
-    this.username = item.username
-    this.rolename = item.rolename
-  }
-}