Electrophotographic photosensitive member

An electrophotographic photosensitive member comprising a conductive substrate and a photosensitive layer, wherein

• the photosensitive layer contains a charge generating material, a hole transport material, a quinone derivative, and a binder resin, and
• the quinone derivative is represented by general formula (1) or (2),
• in the general formula (1),
• R1, R2, and R3 each represent, independently of one another, a hydrogen atom, an alkyl group having a carbon number of at least 1 and no greater than 12, an aryl group having a carbon number of at least 6 and no greater than 14, an aralkyl group having a carbon number of at least 7 or no greater than 12, or a cycloalkyl group having a carbon number of at least 3 and no greater than 10, the aryl group having a carbon number of at least 6 and no greater than 14 may be substituted with an alkyl group having a carbon number of at least 1 and no greater than 6,
• in the general formula (2),
• R4 and R5 each represent, independently of one another, a hydrogen atom, an alkyl group having a carbon number of at least 1 and no greater than 12, an aryl group having a carbon number of at least 6 and no greater than 14, an aralkyl group having a carbon number of at least 7 and no greater than 12, or a cycloalkyl group having a carbon number of at least 3 and no greater than 10, the aryl group having a carbon number of at least 6 and no greater than 14 may be substituted with an alkyl group having a carbon number of at least 1 and no greater than 6, and
• Z represents an oxygen atom or a sulfur atom.