A process cartridge removably installable in an image forming apparatus includes a cartridge body including an image bearer; a cleaning unit removably attached to the cartridge body and including a lubricant supply device to lubricate the image bearer; a first contact terminal disposed in one of the cleaning unit and the cartridge body; and a second contact terminal disposed in the other of the cleaning unit and the cartridge body. The second contact terminal is disposed to contact the first contact terminal to establish electrical continuity between the cartridge body and the cleaning unit, and an end of the first contact terminal includes a sliding contact portion to slidingly contact the second contact terminal in attachment and removal of the cleaning unit to and from the cartridge body.