A lithographic printing plate precursor comprising a photosensitive layer
comprising: (A) a fluorescent brightening agent; (B) an activator
compound being capable of inducing a chemical change by an interaction
with light absorption of the fluorescent brightening agent to produce at
least one of a radical, an acid and a base; (C) a compound being capable
of undergoing a reaction by an effect of at least one of a radical, an
acid and a base to irreversibly change in its physical or chemical
properties; and (D) a polyurethane resin binder, wherein the polyurethane
resin binder is synthesized from at least following compounds (i), (ii),
(iii) and (iv): (i) a diisocyanate compound; (ii) a diol compound having
at least one carboxyl group; (iii) a diol compound having a logP value of
less than 0; and (iv) a diol compound having a logP value of 0 or more,
with the proviso that each of the diol compound (iii) and the diol
compound (iv) does not have a carboxyl group.