PURPOSE: To utilize light utilized for an electrifying process, for an exposure and destaticization, as well and to simplify a constitution by using a common light source always located inside a photosensitive drum in each process of electrification, the exposure and the destaticization.

CONSTITUTION: An electrifying process with the light is principally the same as in the conventional manner except that a fluorescent lamp 14 is arranged inside the photosensitive drum 12. In the exposure and developing processes, an induced charge enters an exposing region by the rotation of the photosensitive drum 12. Irradiation with the light from the fluorescent lamp 14 is selectively executed by a liquid crystal shutter 20 as necessary, to selectively discharge an electrified charge to the surface of a photosensitive body. Then, in the developing process, a toner image that toner is stuck to only a place where the charge exists can be obtained on the surface of the photosensitive body. The toner image is carried to a transfer region by the rotation of the photosensitive drum 12 and transferred/fixed on a paper 22. The photosensitive drum 12 is further rotated to a destatization region 24, a residual charge is removed with the light from the fluorescent lamp 14 and the toner is recovered in a developing unit.