The electrophotographic photoreceptor of the present invention at least includes a charge-generating layer, a charge-transporting layer, and a surface protective layer sequentially deposited on an electroconductive support, wherein the charge-transporting layer contains a charge-transporting material having an ionization potential (IPA); the surface protective layer contains a binder resin and a metal oxide microparticle having an ionization potential (IPB); and the ionization potential (IPA) and the ionization potential (IPB) satisfy the relationship represented by Expression (A): −0.4 eV≦(IPA−IPB)≦0.4 eV.
