Abstract: A novel electroconductive material comprising a copolymer of (A) 30 to 90 % by mole of styrenesulfonic acid salt and (B) 70 to 10 % by mole of at least one of alkyl acrylates or methacrylates having an alkyl group of 1 to 10 carbon atoms and acrylonitrile or methacrylonitrile or a copolymer of (A) 40 to 70 % by mole of styrenesulfonic acid salt, (B) 5 to 20 % by mole of at least one of alkyl acrylates or methacrylates having an alkyl group of 4 to 10 carbon atoms and (C) 10 to 55 % by mole of at least one of styrene, acrylonitrile or methacrylonitrile and alkyl acrylates having an alkyl group of 1 to 3 carbon atoms. The electroconductive material has a superior solvent-resistance and antiblocking property as well as electroconductivity and is useful for an electroconductive, photoconductive and other related copying systems.