A process cartridge includes an image bearing member unit configured to rotatably support an image bearing member, and a developing unit configured to rotatably support a developer bearing member. The developing unit includes a first supported portion configured to be swingably supported with respect to the image bearing member unit, a second supported portion provided configured to be swingably and slidably supported with respect to the image bearing member unit, and a regulated portion configured to be capable of contacting a regulating portion provided on the image bearing member unit. The regulating portion regulates the developing unit from moving in a slide direction of the second supported portion, by contacting the regulated portion, when the image bearing member and the developer bearing member rotate while contacting to each other.