The positive planographic printing plate precursor of the present invention is
a precursor comprising (I) a positive recording layer including a water-insoluble
and alkali-soluble polymer compound and a light to heat converting agent, on a
support having a hydrophilic surface in which a hydrophilic graft polymer chain
is present. The precursor may further comprise (II) a lower layer including a water-insoluble
and alkali-soluble polymer compound between the recording layer and the support.
