Electrophotographic photosensitive member, process cartridge, and image forming apparatus

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

• the photosensitive layer contains a charge generating material, a hole transport material, an electron transport material, and a binder resin,
• the photosensitive layer has a scratch resistance depth of no greater than 0.50 μm,
• the scratch resistance depth of the photosensitive layer representing a hardness of the photosensitive layer containing the binder resin at a ratio of a mass of the binder resin relative to a total mass of the photosensitive layer of at least 0.47 and no greater than 0.60, the binder resin including a polyarylate resin represented by a general formula (1) shown below,
• where, in the general formula (1),
• kr and kt each represent, independently of one another, 2 or 3,
• r+s+t+u=100,
• r+t=s+u, and
• r, s, t, and u each represent, independently of one another, a number of at least 1, s/(s+u) is greater than 0.00 and no greater than 0.90, one of X and Y represents a divalent group represented by a chemical formula (1-1), and the other of X and Y represents a divalent group represented by a chemical formula (1-2):