To provide a lithographic printing plate precursor which generates no
stains in the non-image area and is also excellent in development
latitude. Disclosed is a lithographic printing plate precursor comprising
a support and a photosensitive layer, said lithographic printing plate
precursor further comprising a subbing layer containing a maleamic acid
(co)polymer, in which at least one hydrogen atom on a nitrogen atom is
substituted with an onium group, provided between the photosensitive
layer and the support.