| 摘要 |
A process cartridge is detachably mountable to a main assembly of an electrophotographic image forming apparatus. The cartridge includes an electrophotographic photosensitive member, a cartridge positioning portion, engageable with the main assembly for positioning the cartridge relative to the main assembly, and a cartridge movable member movable by movement of a main assembly movable member, when the cartridge, upon mounting of the cartridge to the main assembly while guided by a main assembly guiding member, stops upstream, with respect to a cartridge mounting direction, of an image formation position where the cartridge positioning portion is engaged with the main assembly positioning portion, the cartridge movable member is moved by movement of a main assembly movable member to contact to the guiding member, by which the cartridge movable member receives, from the guiding member, a force for moving the process cartridge downstream with respect to the mounting direction.
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