Patent ID: 7727688

Claim:
An electrophotographic photoreceptor comprising: a photosensitive layer including a charge transport layer, and a surface layer laminated on a conductive substrate in this order, the surface layer being located on or above the charge transport layer; the photosensitive layer includes an organic substance; and the surface layer comprises nitrogen, at least one element selected from the group consisting of Ga and In, and hydrogen in a range of from 0.1 atomic % to 50 atomic %, wherein a thickness of the surface layer is from about 0.01 μm to less than about 1 μm, a center line average roughness (Ra) of a surface of the surface layer is about 0.1 μm or less, and the surface layer further comprises oxygen and has a concentration distribution of oxygen that decreases from the outer surface of the surface layer toward the photosensitive layer side of the surface layer.