Disclosed is an image forming method using an electrophotographic photoreceptor comprising the steps of:(1) charging the electrophotographic photoreceptor, wherein said electrophotographic photoreceptor comprising a conductive support and provided thereon, a carrier generation layer and a carrier transportation layer, said carrier generation layer comprising a carrier generation material represented by formula 1 or 2 and having X-ray diffraction pattern having peaks at 6.3.degree..+-.0.2.degree., 12.4.degree..+-.0.2.degree., 25.3.degree..+-.0.2.degree. and 27.1.degree..+-.0.2.degree. in Bragg angle (2.theta.) when using Cu-K.alpha. ray as a X-ray radiation source in which said peak of 12.4.degree..+-.0.2.degree. has a maximum intensity and has a half width of 0.65.degree. or more; no peak being present at 11.5.degree..+-.0.2.degree.,(2) imagewise exposing the charged photoreceptor for an exposure time of 1.times.10.sup.-4 to 3.times.10.sup.-2 seconds,(3) developing the imagewise exposed photoreceptor to form an image, and(4) transferring the formed image to an image receiving material: ##STR1##