A lithographic photosensitive material, suitable for exposure with light from a neon-helium laser, comprising a support having thereon a silver halide emulsion layer containing at least one sensitizing dye represented by the following general formula (I): ##STR1## wherein Z and Z.sub.1, which may be the same or different, each represents the non-metal atoms necessary for completing a 5-membered or 6-membered nitrogen-containing heterocyclic nucleus; R and R.sub.1, which may be the same or different, each represents an alkyl group or an aryl group; Q and Q.sub.1 together represent the non-metal atoms necessary for completing a 4-thiazolidinone, 5-thiazolidinone, or 4-imidazolidinone nucleus; L, L.sub.1 and L.sub.2 each represents a methine group; n.sub.1 and n.sub.2 each represents 0 or 1; X represents an anion; and m represents 0 or 1, with m being 0 when the dye forms an internal salt; with the silver halide emulsion layer or a layer adjacent the silver halide emulsion layer containing at least one compound represented by the following general formula (II):D.sub.1 --A--D.sub.2 (II)wherein D.sub.1 and D.sub.2, which may be the same or different, each represents a condensed polycyclic aromatic heterocyclic residue or an aromatic heterocyclic substituted amino group, wherein the polycyclic aromatic heterocyclic residue or the aromatic heterocyclic substituted amino group may contain an --SO.sub.3 M group wherein M represents a hydrogen atom or a cation; and --A-- represents a divalent aromatic residue which may contain an --SO.sub.3 M group wherein M has the same meaning as above; with the proviso that when D.sub.1 or D.sub.2 does not contain an --SO.sub.3 M group, --A-- contains an --SO.sub.3 M group; and with the silver halide photographic material containing at least one polyalkylene oxide compound capable of increasing infectious development.