The problem of the invention aims to provide a technique for improving the stability of a light room and also improving the stability of a dark room, which is in the same way as the Computer-to-Plate (CTP) lithographic printing plate which is already proposed. The invention relates to the CTP lithographic printing plate, which includes an aluminum supporter, a photosensitive layer formed on the aluminum supporter, and a protective layer formed on the photosensitive layer, and is characterized in that the photosensitive layer is formed by ethylenic-linkage unsaturated compounds, alkali-soluble resin, near-infrared absorbing pigment, halogen-substituted methyl compounds and photosensitive resin compositions containing organic boron anionic compounds, wherein the protective layer is formed by resin compositions from a protective layer containing water-soluble or alkali-soluble resin and nitroxyl compounds.