A planographic printing plate precursor includes a support having disposed
thereon a recording layer containing a water-insoluble and alkali-soluble
resin, a development inhibitor and an infrared absorber and exhibiting
enhanced solubility in an aqueous alkali solution through light exposure.
The recording layer may have either a mono-layer construction or a
multi-layer construction containing a lower layer and an upper layer. In
the case of the multi-layer construction, a layer containing the
water-insoluble and alkali-soluble resin is used as the lower layer, and
a layer containing the water-insoluble and alkali-soluble resin and the
development inhibitor and exhibiting enhanced solubility in an aqueous
alkali solution through light exposure is used as the upper layer, and at
least one of the lower layer and the upper layer contains the infrared
absorber.