diff --git a/src/app.module.ts b/src/app.module.ts
index 67f4453..9f36292 100644
--- a/src/app.module.ts
+++ b/src/app.module.ts
@@ -7,6 +7,7 @@ import { databaseConfig } from './config/typeorm.config';
 import { HttpModule } from '@nestjs/axios';
 import { AuthModule } from './auth/auth.module';
 import { OrganModule } from './organ/organ.module';
+import { ComplaintModule } from './complaint/complaint.module';
 
 @Module({
   imports: [
@@ -18,7 +19,8 @@ import { OrganModule } from './organ/organ.module';
     HttpModule.register({global: true, timeout: 10000, headers: {"Content-Type": "application/json"}}),
     UsersModule,
     AuthModule,
-    OrganModule
+    OrganModule,
+    ComplaintModule
   ],
 })
 export class AppModule {}
diff --git a/src/common/enums/messages.enum.ts b/src/common/enums/messages.enum.ts
index 0867abe..d6b3081 100644
--- a/src/common/enums/messages.enum.ts
+++ b/src/common/enums/messages.enum.ts
@@ -22,4 +22,8 @@ export enum AuthMessages {
 
 export enum OrganMessages {
     ORGAN_NOT_FOUND = 'ارگان مورد نظر پیدا نشد!'
+}
+
+export enum ComplaintMessages {
+    COMPLAINT_NOT_FOUND = 'شکایت مورد نظر پیدا نشد!'
 }
\ No newline at end of file
diff --git a/src/complaint/complaint.controller.ts b/src/complaint/complaint.controller.ts
new file mode 100644
index 0000000..b23aab1
--- /dev/null
+++ b/src/complaint/complaint.controller.ts
@@ -0,0 +1,34 @@
+import { Controller, Get, Post, Body, Patch, Param, Delete } from '@nestjs/common';
+import { ComplaintService } from './complaint.service';
+import { CreateComplaintDto } from './dto/create-complaint.dto';
+import { UpdateComplaintDto } from './dto/update-complaint.dto';
+
+@Controller('complaint')
+export class ComplaintController {
+  constructor(private readonly complaintService: ComplaintService) {}
+
+  @Post()
+  create(@Body() createComplaintDto: CreateComplaintDto) {
+    return this.complaintService.create(createComplaintDto);
+  }
+
+  @Get()
+  findAll() {
+    return this.complaintService.findAll();
+  }
+
+  @Get(':id')
+  findOne(@Param('id') id: string) {
+    return this.complaintService.findOneOrFail(id);
+  }
+
+  @Patch(':id')
+  update(@Param('id') id: string, @Body() updateComplaintDto: UpdateComplaintDto) {
+    return this.complaintService.update(id, updateComplaintDto);
+  }
+
+  @Delete(':id')
+  remove(@Param('id') id: string) {
+    return this.complaintService.remove(id);
+  }
+}
diff --git a/src/complaint/complaint.module.ts b/src/complaint/complaint.module.ts
new file mode 100644
index 0000000..36403b9
--- /dev/null
+++ b/src/complaint/complaint.module.ts
@@ -0,0 +1,13 @@
+import { Module } from '@nestjs/common';
+import { ComplaintService } from './complaint.service';
+import { ComplaintController } from './complaint.controller';
+import { TypeOrmModule } from '@nestjs/typeorm';
+import { Complaint } from './entities/complaint.entity';
+import { ComplaintRepository } from './repositories/complaint.repository';
+
+@Module({
+  imports: [TypeOrmModule.forFeature([Complaint])],
+  controllers: [ComplaintController],
+  providers: [ComplaintService, ComplaintRepository],
+})
+export class ComplaintModule {}
diff --git a/src/complaint/complaint.service.ts b/src/complaint/complaint.service.ts
new file mode 100644
index 0000000..0c08a37
--- /dev/null
+++ b/src/complaint/complaint.service.ts
@@ -0,0 +1,41 @@
+import { Injectable, NotFoundException } from '@nestjs/common';
+import { CreateComplaintDto } from './dto/create-complaint.dto';
+import { UpdateComplaintDto } from './dto/update-complaint.dto';
+import { ComplaintRepository } from './repositories/complaint.repository';
+import { Complaint } from './entities/complaint.entity';
+import { ComplaintMessages } from 'src/common/enums/messages.enum';
+
+@Injectable()
+export class ComplaintService {
+  constructor(private readonly complaintRepository: ComplaintRepository) {}
+
+  async create(createComplaintDto: CreateComplaintDto): Promise<Complaint> {
+    const complaint = this.complaintRepository.create(createComplaintDto);
+    await this.complaintRepository.save(complaint);
+    return complaint;
+  }
+
+  async findAll(): Promise<Complaint[]> {
+    return this.complaintRepository.find();
+  }
+
+  async findOneOrFail(id: string): Promise<Complaint> {
+    const complaint = await this.complaintRepository.findOne({ where: { id } });
+    if (!complaint)
+      throw new NotFoundException(ComplaintMessages.COMPLAINT_NOT_FOUND);
+
+    return complaint;
+  }
+
+  async update(id: string, updateComplaintDto: UpdateComplaintDto): Promise<Complaint> {
+    const complaint = await this.findOneOrFail(id);
+    Object.assign(complaint, updateComplaintDto);
+    return complaint;
+  }
+
+  async remove(id: string): Promise<Complaint> {
+    const complaint = await this.findOneOrFail(id);
+    await this.complaintRepository.remove(complaint);
+    return complaint;
+  }
+}
diff --git a/src/complaint/dto/create-complaint.dto.ts b/src/complaint/dto/create-complaint.dto.ts
new file mode 100644
index 0000000..7a533c3
--- /dev/null
+++ b/src/complaint/dto/create-complaint.dto.ts
@@ -0,0 +1,38 @@
+import { ApiProperty } from "@nestjs/swagger";
+import { IsEnum, IsNotEmpty, IsString, IsUUID } from "class-validator";
+import { ComplaintStatus } from "../enums/complaint.enum";
+
+export class CreateComplaintDto {
+    @ApiProperty({
+        example: 'شکایت من',
+        type: 'string'
+    })
+    @IsString()
+    @IsNotEmpty()
+    message: string;
+
+    @ApiProperty({
+        example: 'شکایت من',
+        type: 'string'
+    })
+    @IsString()
+    @IsNotEmpty()
+    subject: string;
+
+    @ApiProperty({
+        example: ComplaintStatus.WAITING_FOR_RESPONSE,
+        enum: ComplaintStatus
+    })
+    @IsEnum(ComplaintStatus)
+    status: ComplaintStatus;
+
+    @ApiProperty({example: 'a1b2c3d4-e5f6-7890-abcd-ef1234567890', description: 'Id of the User that made the complaint'})
+    @IsUUID()
+    @IsNotEmpty()
+    userId: string;
+
+    @ApiProperty({example: 'a1b2c3d4-e5f6-7890-abcd-ef1234567890', description: 'Id of the Orgain the complaint is about.'})
+    @IsUUID()
+    @IsNotEmpty()
+    organId: string;
+}
diff --git a/src/complaint/dto/update-complaint.dto.ts b/src/complaint/dto/update-complaint.dto.ts
new file mode 100644
index 0000000..d017263
--- /dev/null
+++ b/src/complaint/dto/update-complaint.dto.ts
@@ -0,0 +1,4 @@
+import { PartialType } from '@nestjs/swagger';
+import { CreateComplaintDto } from './create-complaint.dto';
+
+export class UpdateComplaintDto extends PartialType(CreateComplaintDto) {}
diff --git a/src/complaint/entities/complaint.entity.ts b/src/complaint/entities/complaint.entity.ts
new file mode 100644
index 0000000..5c6bff9
--- /dev/null
+++ b/src/complaint/entities/complaint.entity.ts
@@ -0,0 +1,44 @@
+import { Column, Entity, JoinColumn, ManyToOne, OneToOne } from 'typeorm';
+import { ComplaintStatus } from '../enums/complaint.enum';
+import { User } from 'src/users/entities/user.entity';
+import { Organ } from 'src/organ/entities/organ.entity';
+import { BaseEntity } from 'src/common/entities/base.entity';
+
+@Entity('complaints')
+export class Complaint extends BaseEntity {
+  @Column({
+    type: 'text',
+  })
+  message: string;
+
+  @Column({
+    type: 'varchar',
+    length: 100,
+  })
+  subject: string;
+
+  @Column({
+    type: 'enum',
+    enum: ComplaintStatus,
+    default: ComplaintStatus.WAITING_FOR_RESPONSE,
+  })
+  status: ComplaintStatus;
+
+  @ManyToOne(() => User, (user) => user.complaints, {
+    nullable: false,
+    onDelete: 'CASCADE',
+  })
+  @JoinColumn({
+    name: 'userId',
+  })
+  complainant: User;
+
+  @ManyToOne(() => Organ, (organ) => organ.complaints, {
+    nullable: false,
+    onDelete: 'CASCADE'
+  })
+  @JoinColumn({
+    name: 'organId'
+  })
+  organ: Organ;
+}
diff --git a/src/complaint/enums/complaint.enum.ts b/src/complaint/enums/complaint.enum.ts
new file mode 100644
index 0000000..db2695b
--- /dev/null
+++ b/src/complaint/enums/complaint.enum.ts
@@ -0,0 +1,4 @@
+export enum ComplaintStatus {
+    WAITING_FOR_RESPONSE = 'waiting_for_response',
+    ANSWERED = 'answered'
+}
\ No newline at end of file
diff --git a/src/complaint/repositories/complaint.repository.ts b/src/complaint/repositories/complaint.repository.ts
new file mode 100644
index 0000000..953dc11
--- /dev/null
+++ b/src/complaint/repositories/complaint.repository.ts
@@ -0,0 +1,17 @@
+import { Injectable } from '@nestjs/common';
+import { Repository } from 'typeorm';
+import { Complaint } from '../entities/complaint.entity';
+import { InjectRepository } from '@nestjs/typeorm';
+
+@Injectable()
+export class ComplaintRepository extends Repository<Complaint> {
+  constructor(
+    @InjectRepository(Complaint) complaintRepository: ComplaintRepository,
+  ) {
+    super(
+      complaintRepository.target,
+      complaintRepository.manager,
+      complaintRepository.queryRunner,
+    );
+  }
+}
diff --git a/src/organ/entities/organ.entity.ts b/src/organ/entities/organ.entity.ts
index 0446cda..37c4fb9 100644
--- a/src/organ/entities/organ.entity.ts
+++ b/src/organ/entities/organ.entity.ts
@@ -1,5 +1,6 @@
 import { BaseEntity } from 'src/common/entities/base.entity';
-import { Column, Entity } from 'typeorm';
+import { Complaint } from 'src/complaint/entities/complaint.entity';
+import { Column, Entity, OneToMany } from 'typeorm';
 
 @Entity('organs')
 export class Organ extends BaseEntity {
@@ -13,4 +14,7 @@ export class Organ extends BaseEntity {
     type: 'varchar',
   })
   logo: string;
+
+  @OneToMany(() => Complaint, (complaint) => complaint.organ)
+  complaints: Complaint[];
 }
diff --git a/src/organ/repositories/organ.repository.ts b/src/organ/repositories/organ.repository.ts
index 6256ce3..fd0c1ef 100644
--- a/src/organ/repositories/organ.repository.ts
+++ b/src/organ/repositories/organ.repository.ts
@@ -1,7 +1,9 @@
 import { Repository } from "typeorm";
 import { Organ } from "../entities/organ.entity";
 import { InjectRepository } from "@nestjs/typeorm";
+import { Injectable } from "@nestjs/common";
 
+@Injectable()
 export class OrganRepository extends Repository<Organ> {
     constructor(@InjectRepository(Organ) organRepository: Repository<Organ>) {
         super(organRepository.target, organRepository.manager, organRepository.queryRunner);
diff --git a/src/users/entities/user.entity.ts b/src/users/entities/user.entity.ts
index af304de..e3fec40 100644
--- a/src/users/entities/user.entity.ts
+++ b/src/users/entities/user.entity.ts
@@ -2,6 +2,7 @@ import { Entity, Column, ManyToMany, JoinTable, OneToMany } from 'typeorm';
 import { BaseEntity } from 'src/common/entities/base.entity';
 import { Exclude } from 'class-transformer';
 import { UserRole } from './user-role.entity';
+import { Complaint } from 'src/complaint/entities/complaint.entity';
 
 @Entity('users')
 export class User extends BaseEntity {
@@ -33,4 +34,9 @@ export class User extends BaseEntity {
     cascade: true
   })
   roles: UserRole[];
+
+  @OneToMany(() => Complaint, (complaint) => complaint.complainant, {
+    cascade: true
+  })
+  complaints: Complaint[];
 }