Actinic energy ray curable composition, and cured film and antireflection film thereof

Provided are: an actinic energy ray curable composition which comprises a low refractive index material that dissolves in a general purpose solvent, and which is capable of imparting excellent scratch resistance to the surface of a cured coating thereof; and a cured film and an antireflection film thereof. Specifically provided are: the actinic energy ray curable composition which is characterized by comprising a poly(perfluoroalkylene ether) chain-containing actinic energy ray curable multifunctional compound (I), and an actinic energy ray curable compound (II) which is a copolymer of polymerizable unsaturated monomers having, on a side chain, a fluorinated alkyl group (x) having 1 to 6 carbon atoms and to which a fluorine atom is bonded, and an actinic energy ray curable group (y), and which has a silicone chain (z) having a molecular weight of 2000 or more on one end of the copolymer; and the cured film and the antireflection film obtained by curing the actinic energy ray curable composition.