Patent ID: 8670692

Claim:
A photosensitive conductor unit comprising: a casing rotatably retaining a photosensitive conductor drum including an engaging portion on an end in axial direction of the photosensitive conductor drum, and a guide portion disposed in proximity to the end opposite to the engaging portion in axial direction of the photosensitive conductor drum; and a protective cover for protecting at least a portion of the surface of the photosensitive conductor drum that is exposed from the casing and detachably attached to the casing including a hook portion that engages with the engaging portion, a positioning portion formed in proximity of the engaging portion to determine the position of the protective cover, a side wall covering an exposed portion of the surface by extending along an axial direction of the photosensitive conductor drum, and a rail portion extending along an axial direction of the photosensitive conductor drum in proximity to both ends of the side wall in a direction orthogonal to the axial direction of the photosensitive conductor drum, and engaging with the guide portion such that the guide portion slidably guides the protective cover, wherein the photosensitive conductor unit is detachably attached and slides along an axial direction of the photosensitive conductor drum with respect to an image forming apparatus main body, the image forming apparatus main body includes a positioning indentation, and when attaching the photosensitive conductor unit to the image forming apparatus main body in a configuration in the protective cover has been attached to the photosensitive conductor unit, the position of the positioning portion is determined by engagement with the positioning indentation.