| 摘要 |
A process cartridge detachably mountable to a main assembly of an image forming apparatus includes a photosensitive member unit including an electrophotographic photosensitive member; developing unit, including a developing roller for developing an electrostatic latent image formed on the photosensitive member, movable between a contact position in which the developing roller is contacted to the photosensitive member and a separated position in which the developing roller is separated from the photosensitive member; a drive transmitting portion for transmitting a driving force for driving the developing roller at one longitudinal end side of the developing unit, wherein the drive transmitting portion provides, to the developing unit, a force for moving the developing unit in a direction from the separated position toward the contact position by receiving the driving force; an urging member for urging, at the other longitudinal end side of the developing unit, the developing unit so that the developing unit is moved in the direction from the separated position toward the contact position; and a force receiving portion, provided only at the other longitudinal end side of the developing unit, for receiving a force, from the main assembly, for moving the developing unit from the contact position to the separated position.
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