Image forming apparatus and image forming system

An image forming apparatus configured to form an image on a recording material, the image forming apparatus comprising:

• an apparatus body;
• a first process cartridge comprising a first image bearing member and a first developing roller configured to supply first toner to the first image bearing member, the first process cartridge being detachably attached to the apparatus body;
• a toner cartridge configured to accommodate the first toner and detachably attached to the apparatus body independently from the first process cartridge;
• and
• a second process cartridge comprising a second image bearing member and a second developing roller configured to supply second toner to the second image bearing member, the second process cartridge being detachably attached to the apparatus body and configured not to be replenished with the second toner in a state where the second process cartridge is attached to the apparatus body.