Electrophotographic photoreceptor, image-forming apparatus, and electrophotographic cartridge

An electrophotographic photoreceptor comprising a photosensitive layer containing at least one charge transport material represented by the following formula (1) or (2) and a copolymerized polycarbonate resin having repeating units represented by the following formulae (3) and (4):

• wherein each of R1 to R7 independently represents a hydrogen atom, an alkyl group, an aryl group or an alkoxy group, n represents an integer of 1 to 3, each of k, l, q and r independently represents an integer of 1 to 5, and each of m, o and p independently represents an integer of 1 to 4;
• wherein each of R8 to R12 independently represents a hydrogen atom, an alkyl group, an aryl group or an alkoxy group, each of s, t and u represents an integer of 1 to 5, and eachof v and w represents an integer of 1 to 4;
• wherein Z forms a cyclic saturated aliphatic alkyl group having a carbon number of 5 to 8 including the carbon atom bonded thereto, and the cyclic saturated aliphatic alkyl group has from 1 to 3 methyl groups as the substituent;
• wherein each of R13 to R16 independently represents a hydrogen atom or a methyl group.