Abstract: An electrophotographic photoconductor is disclosed, which comprises a flexible film-type substrate, an electroconductive layer formed on a front surface of the substrate, a photoconductive layer formed on the electroconductive layer, and a curl prevention layer formed on the back side of the substrate opposite to the back side thereof, in which the curl prevention layer comprises one resin component selected from the group consisting of a polysulfone resin and a polyarylate resin.