A process cartridge of the present invention is removably mounted to the body of an image forming apparatus and includes an image carrier and a developing device configured to develop a latent image formed on the image carrier. A cartridge body, forming major part of the process cartridge, is applicable to a developer of any kind stored in the developing device and is mounted to the apparatus body with an identification member indicative of the kind of the developer fitted thereon. With this configuration, the process cartridge can be surely replaced without any mistake and reduces costs necessary for production, inventory control and delivery.