| 摘要 |
A developing unit detachably mountable in a photosensitive member unit including a photosensitive member on which an electrostatic latent image is formable, a pressing member, and a positioning portion includes: a developing unit frame; a developing roller; and a directing portion. The developing roller is rotatably supported to the developing unit frame, and configured to supply developing agent to the electrostatic latent image formed on the photosensitive member. The directing portion is fixed to the developing unit frame for directing the developing unit frame to a predetermined orientation and for fixing a position of the developer unit frame. The directing portion includes: a pressed portion configured to receive a pressure force from the pressing member for moving the developing roller toward the photosensitive member; and a positioned portion abuttable on the positioning portion for positioning the developing unit relative to the photosensitive member unit.
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