IMAGE FORMING APPARATUS

PROBLEM TO BE SOLVED: To provide an image forming apparatus capable of accurately performing adjustment of imaging conditions on the basis of a detection result of surface potential detection means for detecting a surface potential of an image carrier.SOLUTION: An image forming apparatus adjusts imaging conditions on the basis of a surface potential of a photoreceptor drum 1Y (image carrier) on the downstream side of a developing position when the intensity of exposure light L from an exposure device 7Y is at a first value and at a second value, while the drive of a developing roller 51 (developer carrier) is stopped and the developing roller 51 is applied with a developing bias equivalent to a developing bias during a developing step.