A process unit including a first housing detachably attachable to an image forming apparatus, an image carrier to carry an image on a surface of the image carrier, 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 to store the toner removed from the surface of the image carrier. The first housing includes the image carrier and at least one of the charger, the developing device, and the cleaning device. The lubricant, the lubricant container, and the waste toner container together are detachably attachable to the first housing.