PURPOSE: To perform excellent cleaning and to obtain an excellent image without causing a fog on an image both in a multicolor mode and a monocolor mode for recording on a large-size recording paper.

CONSTITUTION: This is an image forming device where an electrostatic charger 12, an image exposing means 13, plural developing devices 14, a transferring belt device 30, a destaticizer 15 and a cleaning device 16 are at least provided on the peripheral part of a photosensitive drum 10, and which performs a cleaning the photosensitive drum 10 that completes transferring a formed toner image on a transferring material by the cleaning device 16 after destaticizing by the destaticizer 15; and the destaticizer 15 sets plural kinds of destaticizing voltage.