An electrophotographic photoreceptor (1; 101) (including an electroconductive substrate (201); a photosensitive layer (202; 203, 204) located overlying the electroconductive substrate; and an outermost layer (205) located overflying the photosensitive layer, wherein the outermost layer include filler and a crosslinked resin having a residual group of a polycarboxylic acid compound and a group having the following formula (1):