The invention provides an electrophotographic photoreceptor, a process cartridge, and an image forming apparatus. The electrophotographic photoreceptor includes a conductive substrate and a photosensitive layer provided on the conductive substrate, wherein an outermost surface layer includes a cured film of a composition containing inorganic particles having polymerizable groups and at least one selected from the reactive compounds represented by the following formulae (I) and (II): wherein F represents a charge transporting skeleton; L represents a divalent linking group; and m represents an integer of 1 to 8, wherein F represents a charge transporting skeleton; L' represents an (n+1)-valent linking group; m' represents an integer of 1 to 6; and n represents an integer of 2 to 3.