A development device includes a first frame and a second frame. The second frame is configured to be combined with the first frame by fixing first, second and third walls of the first frame to the second frame. The first and second walls are disposed opposite to each other, and the third wall is configured to connect the first and second walls. An opening is formed by the combined first and second frames. The first frame includes first and second engageable portions, and the second frame includes third and fourth engageable portions, such that engagement of the first and second engageable portions with the third and fourth engageable portions brings the first and second frames into alignment. The first and second engageable portions are disposed between the first wall and the second wall.