Electrophotolithographic printing plate precursor

An electrophotolithographic plate precursor having on a conductive support at least one photoconductive layer containing at least a photoconductive zinc oxide, a color sensitizing dye and a binder resin, in which the binder resin contains at least one binder resin (P):

• the binder resin (P) being a random copolymer (i) having a weight average molecular weight of from 5.times.10.sup.4 to 5.times.10.sup.5, (ii) comprising (a) a polymer component having repeating units of the following formula (I) in an amount of 50% by weight or more, (b) a polymer component containing at least one polar group selected from the group consisting of --PO.sub.3 H.sub.2, --COOH, --SO.sub.3 H, --SO.sub.2 H and cyclic acid anhydride-containing groups, in an amount of from 0.1 to 10% by weight, and (c) a polymer component having a Fedors' solution parameter of 9.0 or more and containing at least one aprotic polar group, in an amount of from 0.5 to 10% by weight, and (iii) having at least one polar group selected from the group consisting of --PO.sub.3 H.sub.2, --COOH, --SO.sub.3 H, --SO.sub.2 H and cyclic acid anhydride-containing groups at one end of the main chain of the copolymer:
• ##STR91## where a.sub.1 represents a hydrogen atom or a methyl group;
• and R represents an alkyl group having from 1 to 4 carbon atoms or an aromatic group.