Patent ID: 7244535

Claim:
An electrophotographic photoreceptor comprising an electroconductive substrate and a photosensitive layer formed thereon, wherein in the photosensitive layer comprises a polyester resin which is a copolymerized polyester resin having at least two different types of repeating ester structure (A) each comprising a bivalent phenol residue represented by the following formula (1) and an aromatic dicarboxylic acid residue represented by the following formula (3), and a repeating ester structure (B) comprising a bivalent phenol residue represented by the following formula (2) and an aromatic dicarboxylic acid residue represented by the formula (3): wherein 0.1<x/(x+y)<0.9, wherein x represents the molar ratio of the repeating ester structure comprising a residue represented by the formula (2) and a residue represented by the formula (3) and y represents the molar ratio of the repeating ester structure comprising a residue represented by the formula (1) and a residue represented by the formula (3).