PROBLEM TO BE SOLVED: To provide a lubricant coating material which enables formation of a lubricant coating film (surface lubricant layer) excellent in lubricity and durability.SOLUTION: The lubricant coating material contains a block copolymer including: a hydrophilic domain having a constitutional unit derived from a hydrophilic monomer with a molecular weight of 120 or more, having a hydrophilic side chain having a repeating unit and a reactive domain having a constitutional unit derived from a monomer having a carbonyl group.