Electrophotographic photoreceptor, process cartridge, and image forming apparatus

An electrophotographic photoreceptor comprising:

• a conductive substrate;
• and
• a lamination type photosensitive layer disposed on the conductive substrate and including a charge generation layer and a charge transport layer,
• wherein the charge transport layer contains
• a charge transport material,
• at least one of a polyester resin or a polycarbonate resin that has a constitutional unit containing biphenyl represented by Formula (1), and
• an aromatic dicarboxylic acid represented by Formula (2),
• in Formula (1), j represents an integer of 0 or greater and 4 or less, and when j is an integer greater than zero, each R11 independently represents a methyl group or an ethyl group, k represents an integer of 0 or greater and 4 or less, and when k is an integer greater than zero, each R12 independently represents a methyl group or an ethyl group,
• in Formula (2), p represents an integer of 0 or greater and 4 or less, and p is an integer greater than zero, each R21 independently represents a methyl group or an ethyl group, q represents an integer of 0 or greater and 4 or less, and when q is an integer greater than zero, each R22 independently represents a methyl group or an ethyl group, r represents an integer of 0 or greater and 4 or less, and when r is an integer greater than zero, each R23 independently represents a methyl group or an ethyl group, and n represents 0 or 1.