An image forming apparatus includes an apparatus main assembly, a controller provided in the apparatus main assembly, an operating portion mounted to the apparatus main assembly, a cable configured to electrically connect the controller and the operating portion, the cable having a connectable length with the operating portion mounted at a predetermined position, and an accommodating portion provided in the apparatus main assembly and configured to accommodate an excessive length portion of the cable connected with the operating portion mounted to the apparatus main assembly, the accommodating portion including a space for accommodating the cable in a wound state.