This specification discloses a process kit removably mountable on the main body of an image formation apparatus and integrally having an image bearing member and a part or the whole of process device acting on the image bearing member, and an image formation apparatus using such kit. The image formation apparatus having an image bearing member, process device acting on the image bearing member, a process kit removably mountable on the main body of the apparatus and integrally having the image bearing member and the process device, and a cover movable to a first position for covering the surface of the image bearing member provided in the process kit and a second position retracted away from the first position. This specification also discloses a process kit removably mountable on the main body of the image formation apparatus and having an image bearing member, a cover movable to a first position for covering the surface of the image bearing member and a second position retracted away from the first position, and process device acting on the image bearing member.