diff --git a/src/Application/Staffs/Queries/GetStaffByRoom.cs b/src/Application/Staffs/Queries/GetStaffByRoom.cs
index 9f1ac07b..60db1c83 100644
--- a/src/Application/Staffs/Queries/GetStaffByRoom.cs
+++ b/src/Application/Staffs/Queries/GetStaffByRoom.cs
@@ -1,5 +1,8 @@
+using Application.Common.Interfaces;
 using Application.Common.Models.Dtos.Physical;
+using AutoMapper;
 using MediatR;
+using Microsoft.EntityFrameworkCore;
 
 namespace Application.Staffs.Queries;
 
@@ -9,4 +12,37 @@ public record Query : IRequest<StaffDto>
     {
         public Guid RoomId { get; init; }
     }
+    
+    public class QueryHandler : IRequestHandler<Query, StaffDto>
+    {
+        private readonly IApplicationDbContext _context;
+        private readonly IMapper _mapper;
+
+        public QueryHandler(IApplicationDbContext context, IMapper mapper)
+        {
+            _context = context;
+            _mapper = mapper;
+        }
+
+        public async Task<StaffDto> Handle(Query request, CancellationToken cancellationToken)
+        {
+            var room = await _context.Rooms
+                .Include(x => x.Department)
+                .Include(x => x.Staff)
+                .ThenInclude(x => x.User)
+                .FirstOrDefaultAsync(x => x.Id.Equals(request.RoomId), cancellationToken: cancellationToken);
+
+            if (room is null)
+            {
+                throw new KeyNotFoundException("Room does not exist.");
+            }
+
+            if (room.Staff is null)
+            {
+                throw new KeyNotFoundException("Staff does not exist.");
+            }
+            
+            return _mapper.Map<StaffDto>(room.Staff);
+        }
+    }
 }
\ No newline at end of file
diff --git a/tests/Application.Tests.Integration/Staffs/Queries/GetStaffByRoomTests.cs b/tests/Application.Tests.Integration/Staffs/Queries/GetStaffByRoomTests.cs
new file mode 100644
index 00000000..123e2542
--- /dev/null
+++ b/tests/Application.Tests.Integration/Staffs/Queries/GetStaffByRoomTests.cs
@@ -0,0 +1,97 @@
+using Application.Common.Mappings;
+using Application.Common.Models.Dtos.Physical;
+using Application.Identity;
+using Application.Staffs.Queries;
+using Application.Users.Queries;
+using AutoMapper;
+using Domain.Entities;
+using Domain.Entities.Physical;
+using FluentAssertions;
+using Xunit;
+
+namespace Application.Tests.Integration.Staffs.Queries;
+
+public class GetStaffByRoomTests : BaseClassFixture
+{
+    private readonly IMapper _mapper;
+    
+    public GetStaffByRoomTests(CustomApiFactory apiFactory) : base(apiFactory)
+    {
+        var configuration = new MapperConfiguration(config => config.AddProfile<MappingProfile>());
+        _mapper = configuration.CreateMapper();
+    }
+    
+    [Fact]
+    public async Task ShouldReturnStaff_WhenRoomHaveStaff()
+    {
+        // Arrange
+        var department = CreateDepartment();
+        var room = CreateRoom(department);
+        var user = CreateUser(IdentityData.Roles.Staff, "123123");
+        var staff = CreateStaff(user, room);
+        await AddAsync(staff);
+
+        var query = new GetStaffByRoom.Query()
+        {
+            RoomId = room.Id 
+        };
+
+        // Act
+        var result = await SendAsync(query);
+
+        // Assert
+        result.Should().BeEquivalentTo(_mapper.Map<StaffDto>(staff), 
+            config => config.Excluding(x => x.User.Created));
+        result.User.Should().BeEquivalentTo(_mapper.Map<UserDto>(user), 
+            config => config.Excluding(x => x.Created));
+        result.Room.Should().BeEquivalentTo(_mapper.Map<RoomDto>(room));
+
+        // Cleanup
+        Remove(staff);
+        Remove(await FindAsync<User>(user.Id));
+        Remove(await FindAsync<Room>(room.Id));
+        Remove(await FindAsync<Department>(department.Id));
+    }
+
+    [Fact]
+    public async Task ShouldThrowKeyNotFoundException_WhenRoomDoesNotExist()
+    {
+        // Arrange 
+        var query = new GetStaffByRoom.Query()
+        {
+            RoomId = Guid.NewGuid()
+        };
+        
+        // Act
+        var action = async () => await SendAsync(query);
+
+        // Assert
+        await action.Should().ThrowAsync<KeyNotFoundException>()
+            .WithMessage("Room does not exist.");
+    }
+
+    [Fact]
+    public async Task ShouldThrowKeyNotFoundException_WhenRoomDoesNotHaveStaff()
+    {
+        // Arrange 
+        var department = CreateDepartment();
+        var room = CreateRoom(department);
+        await AddAsync(room);
+
+        var query = new GetStaffByRoom.Query()
+        {
+            RoomId = room.Id
+        };
+        
+        // Act
+        var action = async () => await SendAsync(query);
+
+        // Assert
+        await action.Should().ThrowAsync<KeyNotFoundException>()
+            .WithMessage("Staff does not exist.");
+        
+        // Cleanup
+        Remove(room);
+        Remove(await FindAsync<Department>(department.Id));
+    }
+}
\ No newline at end of file