A process cartridge includes a developing cartridge including a developer carrier, a fitting part, and a pressed part, and a photosensitive cartridge, to which the developing cartridge is removably mounted. The photosensitive cartridge includes a photosensitive member, a positioning part which is fitted into the fitting part for positioning the developing cartridge, and a pressing part which contacts the pressed part for pressing the developing cartridge toward the photosensitive member, wherein the positioning part and the pressing part are provided longitudinally in an area in a longitudinal direction of the photosensitive member corresponding to an area on the photosensitive member in which a developer image is formed.