The present invention provides a planographic printing plate precursor having a support, a photosensitive layer and a protective layer. The photosensitive layer contains at least an infrared absorbing agent, a polymerization initiating agent, a polymerizable compound and a binder polymer having repeating units represented by the following Formula (i). Further, the protective layer contains at least an inorganic lamellar compound. ##STR00001## In Formula (i), R.sup.1 represents a hydrogen atom or a methyl group; R.sup.2 represents a connecting group having two or more types of atom selected from the group consisting of a carbon atom, a hydrogen atom, an oxygen atom, a nitrogen atom, and a sulfur atom and having 2 to 82 atoms in total; A represents an oxygen atom or --NR.sup.3--, and R.sup.3 represents a hydrogen atom or a monovalent hydrocarbon group having 1 to 10 carbon atoms; and n is an integer of 1 to 5.