To provide an image forming device which eliminates potential fall, the image unevenness or the like due to electrifying defect by means of preventing transfer residual toner from sticking to an electrifying member.

In this image forming device capable of removing the toner remaining on the image carrier 1 by a removing means 12, after transferring the developed image on the image carrier 1 to transfer material, and applying voltage on the electrifying member 2 for developing the subsequent image on the image carrier 1, the device is provided with a controlling means 13 for controlling the frequency of AC component of voltage to be applied to the electrifying member 2 so that vibration is prevented from occurring on the image carrier 1, when removing the toner by the removing means 12.