Patent ID: 7625682

Claim:
An electrophotographic photoreceptor comprising: a conductive substrate; an undercoat layer; and an organic photosensitive layer, wherein the organic photosensitive layer has a creep value C Iτ of 2.70% or more and an elastic work efficiency η HU of 47% or more when an indentation maximum load of 5 mN is loaded on its surface under a circumstance at a temperature of 25° C. and at a relative humidity of 50%, wherein the organic photosensitive layer comprises a charge generating layer laminated on the conductive substrate, and a charge transporting layer is stacked further on the charge generating layer, said charge transporting layer containing a charge transporting substance and at least one binder resin comprising two separate polycarbonates, and wherein the charge transporting substance is a compound represented by the following structural formula (1)