An electrophotographic photoreceptor to be used in an image forming apparatus having a charge providing means by contacting a charging member to an electrophotographic photoreceptor is disclosed. The photoreceptor has at least an interlayer, a charge generation layer and a charge transfer layer each provided on an electroconductive substrate, and the interlayer has a thickness of from 5 to 25 .mu.m and the charge transfer layer has a thickness of from 5 to 20 .mu.m. An image forming apparatus, image forming method and cartridge for the method are also disclosed.