An image forming apparatus includes a housing; a powered body for image formation provided inside the housing; an attachable/detachable body that is attached to and detached from the housing; a power supply path body that is attached to and detached from the attachable/detachable body to form a power supply path; and a substrate that supplies power to the powered body, is directly mounted on the attachable/detachable body or the power supply path body, and is separated from the attachable/detachable body or the power supply path body.