The invention provides an electrophotographic photoreceptor,the manufacturing method thereof, a process cartridge and an imaging device. The electrophotographic photoreceptor of the present invention includes a cylindrical support, a photosensitive layer and an outermost surface layer that are layered onto the cylindrical support in this sequence from the cylindrical support side. The outermost surface layer includes a charge transport material and a curable resin. The proportion of the content of the curable resin in the outermost surface layer increases in the layer thickness direction withdistance from the photosensitive layer side. The process cartridge and electrophotographic apparatus of the present invention are provided with the electrophotographic photoreceptor.