Lithographic printing plate precursor, method for preparing lithographic printing plate, and lithographic printing method

A lithographic printing plate precursor, comprising:

• a support;
• and
• an image-recording layer on the support,
• wherein the image-recording layer contains an infrared absorber, a polymerization initiator, and a polymer A,
• a weight-average molecular weight of the polymer A is more than 15,000 and 150,000 or less,
• an ethylenically unsaturated bond valence of the polymer A is 3.0 mmol/g or more,
• the polymer A has a structure represented by any of Formula (A-1) to Formula (A-3),
• in Formula (A-1), RA1 represents a hydrogen atom or an alkyl group having 1 to 8 carbon atoms, and the portion of a wavy line represents a bonding position with other structures, and
• the polymer A further includes a group having two or more polymerizable groups in each of the other structures bonded at the wavy lines.