PROBLEM TO BE SOLVED: To provide a fluorine atom-containing polymerizable resin capable of imparting scratch resistance to a coating film surface, an active energy ray-curable composition, a cured product thereof, and an article with a coating film of the composition.SOLUTION: A fluorine atom-containing polymerizable resin is obtained by reacting a polymer (P1) of a polymerizable unsaturated monomer (A) containing a fluorinated alkyl group and a polymerizable unsaturated monomer (B1) containing a reactive functional group (b1) and an adamantyl group with a compound (C) having a functional group (c) which is reactive with (b1) and a polymerizable unsaturated group, or reacting a polymer (P2) of (A) and (B1) or a polymerizable unsaturated monomer (B2) having an adamantyl group not containing (b1) and a polymerizable unsaturated monomer (B3) having a reactive functional group (b3) with a compound (C) having a functional group (c) which is reactive with (b1) or (b3) and a polymerizable unsaturated group. An activ
