A positive working photosensitive lithographic printing plate comprising a support having thereon a photosensitive layer comprising a positive photosensitive composition, wherein the positive photosensitive composition comprises a mixture of (a) a phenol derivative, (b) a water-soluble and aqueous alkali-soluble resin, and (c) o-quinonediazide or a mixture of a compound capable of forming an acid on exposure and a compound having at least one C--O--C group which is decomposable with an acid, and wherein the phenol derivative is a mixture of a compound represented by the following formula (I) and a compound represented by the following formula (II): ##STR1## wherein X.sup.1, X.sup.2, X.sup.3, X.sup.4, X.sup.5 and X.sup.6 are the same or different and each represents --CH.sub.2 OH or a hydrogen atom, provided that at least three of them are each --CH.sub.2 OH; ##STR2## wherein Y.sup.1, Y.sup.2, Y.sup.3, Y.sup.4, Y.sup.5 and Y.sup.6 are the same or different and each represents --CH.sub.2 OCH.sub.3, --CH.sub.2 OH or a hydrogen atom, provided that at least three of them are each --CH.sub.2 OCH.sub.3 or --CH.sub.2 OH, and at least one of the three is --CH.sub.2 OCH.sub.3.