Patent ID: 8859172

Claim:
An electrophotographic photosensitive member, comprising: a support, a photosensitive layer formed on the support, wherein the electrophotographic photosensitive member comprises a surface layer comprising a polymer obtainable by the polymerization of a charge-transporting substance with two or more methacryloyloxy groups in the same molecule, wherein the surface layer further comprises a quinone derivative, the quinone derivative being at least one compound selected from the group consisting of: a compound represented by the following formula (1), and a compound represented by the following formula (2), wherein the content of the quinone derivative in the surface layer is not less than 5 ppm and not more than 1500 ppm relative to the total mass of the polymer: wherein, in the formulas (1) and (2), R 71 to R 74 , R 76 , R 77 , R 79 , and R 80 each independently represents a hydrogen atom, a hydroxy group, an unsubstituted or substituted alkyl group, an unsubstituted or substituted aryl group, or an unsubstituted or substituted alkoxy group, at least one of the R 71 and R 74 is a hydrogen atom, a methyl group, or a hydroxy group, at least one of the R 72 and R 73 is a hydrogen atom, a methyl group, or a hydroxy group, at least one of the R 76 and R 80 is a hydrogen atom, a methyl group, or a hydroxy group, at least one of the R 77 and R 79 is a hydrogen atom, a methyl group, or a hydroxy group, R 75 and R 78 each independently represents a hydrogen atom, an unsubstituted or substituted alkyl group, or an unsubstituted or substituted aryl group, at least one of the R 75 and R 78 is a hydrogen atom, and a substituent group of the substituted alkyl group, a substituent group of the substituted aryl group, and a substituent group the substituted alkoxy group is each independently a carboxyl group, a cyano group, a dialkylamino group, a hydroxy group, an alkyl group, an alkoxy-substituted alkyl group, a halogen-substituted alkyl group, an alkoxy group, an alkoxy-substituted alkoxy group, a halogen-substituted alkoxy group, a nitro group, a halogen atom.