There is provided a lithographic printing plate precursor having good on-machine development quality, and moreover high sensitivity and high printing durability, which comprises a support having provided thereon an image forming layer containing (1) at least one ingredient selected from the group consisting of fine particles containing a compound having two or more vinyloxy groups and microcapsules encapsulating a compound having two or more vinyloxy groups, (2) a light-to-heat conversion agent, (3) a hydrophilic resin and (4) an acid precursor.