The present disclosure relates to an electrophotographic photoreceptor which can suppress occurrence of abnormalities such as peeling or falling off of a film from a substrate end portion in a film formation step of a surface layer and maintain and reproduce a stable printing quality even in a use stage after productization, and an image forming apparatus including the same. An electrophotographic photoreceptor includes a cylindrical substrate including a chamfered face located between an substrate outer circumferential surface and a substrate end face, and a surface layer located on the outer circumferential surface. The substrate outer circumferential surface includes a first uneven portion. The chamfered face includes a second uneven portion and a third uneven portion located on a surface of the second uneven portion. A surface roughness Sa of the second uneven portion is larger than a surface roughness Sa of the third uneven portion.