To provide a photosensitive planographic printing plate suitable for exposure with laser light of 700-1,200 nm and excellent in printing durability, recoverability from scumming, and linearity, and to provide a processing method for the same and an image forming method for a photosensitive planographic printing plate.

In the photosensitive planographic printing plate having a photopolymerizable photosensitive layer on an aluminum substrate treated with a polyvinylphosphonic acid, the photopolymerizable photosensitive layer contains at least one of the amine monomers represented by formula (1) or formula (2) and at least one of dyes having an absorption maximum wavelength at 700-1,200 nm.