An image forming apparatus, includes: a mainframe; a photoreceptor; an exposing
unit that exposes a surface of the photoreceptor to form an electrostatic latent
image; and a developing unit that develops the electrostatic latent image by supplying
a charged developer on the surface of the photoreceptor having the electrostatic
latent image formed thereon. The photoreceptor is loadable in and unloadable from
the mainframe separately from the developing unit.