To provide a planographic printing plate and a method for producing the same by which warming-free one-pass coating is enabled without lowering printing performance to enhance production efficiency.

In the method for producing a planographic printing plate in which the top of a support is coated with at least an undercoat layer and a silver halide emulsion layer, and after drying, continuous coating with a physical developing nucleus layer is carried out without winding, an inorganic sulfate is contained in the undercoat layer and/or the silver halide emulsion layer.