An image forming apparatus includes a main body, a process cartridge, and a supporting frame. The process cartridge has a photosensitive drum defining a rotation axis extending in an axial direction, and an urging portion. The supporting frame is configured to support the process cartridge and be movable in a sliding direction between an inner position and an outer position of the main body. The urging portion is configured to exert urging force on the process cartridge in the state where the supporting frame supporting the process cartridge is in the inner position, such that the process cartridge is moved to the second position from the first position.