Process unit and image forming apparatus including same

An image forming apparatus comprising:

• a process unit, the process unit including:
• a first housing detachably attachable to the image forming apparatus;
• an image carrier to carry an image on a surface thereof;
• a charger to charge the surface of the image carrier;
• a developing device to form the image on the surface of the image carrier;
• a cleaning device to remove toner from the surface of the image carrier;
• a lubricant to be supplied to the surface of the image carrier;
• a lubricant container to contain the lubricant;
• and
• a waste toner container having an enclosed space with an opening through a side thereof to store the toner removed from the surface of the image carrier until the space is filled,
• wherein the first housing includes the image carrier and at least one of the charger, the developing device, and the cleaning device,
• wherein the lubricant, the lubricant container, and the waste toner container together are detachably attachable to the first housing, and
• wherein the lubricant and the waste toner container together are detachably attachable to the first housing in a state in which the first housing remains attached to the image forming apparatus.