The invention provides an image forming apparatus provided with an image bearing body, and developer charge providing device for providing a charge thereby charging residual developer, remaining on the image bearing body after image transfer, to a normal polarity. The developer charge providing device charges an area of the image bearing body, and such area is further charged by the charging device. When the voltage applied to the developer charge providing device for charging such area is, varied, the voltage applied to the charging means for charging such area is also varied. Thus the image forming apparatus can execute uniform charging in stable manner over a prolonged period.