An image forming apparatus including an image holding member, an image forming section that forms an image on the image holding member, a main frame that houses at least the image holding member and the image forming section, a cover body that is mounted to the main frame so as to be able to tilt down and includes a side cover for opening and closing a side surface of the main frame and a top cover for opening and closing a top surface of the main frame; and a unit that is mounted to and dismounted from the side cover by moving in a vertical direction between the top cover and the main frame in a state where the cover body is tilted down, is provided.