Patent ID: 8041258

Claim:
A process cartridge comprising: a photosensitive drum that is configured to be rotatable around a rotational axis extending in a first direction; a drum drive input member configured to receive a driving force for rotating the photosensitive drum; and a frame that includes: a first side wall that is disposed to extend along a second direction substantially perpendicular to the first direction; a second side wall that is disposed to extend along the second direction and being closer to the drum drive input member than the first side wall, wherein the photosensitive drum is disposed between the first side wall and the second side wall; and a substantially cylindrical projecting portion that projects from the second side wall along a direction substantially parallel to the first direction, the projecting portion being disposed such that the drum drive input member is disposed on a center axial line of the projecting portion, the projecting portion having a first projecting portion that has a first projecting amount and a second projecting portion that has a second projecting amount larger than the first projecting amount.