To provide a curable resin composition.

The curable resin composition comprises a reactive fluorine-containing oligomer obtained by allowing a copolymer, obtained by causing a fluorine-containing monomer of formula (4A) to react with an ester monomer of formula (4B), to react with an isocyanate group-containing reactive compound of the formula (5): CH2=CR5-COO-R1-O-Rf (4A) and CH2=CR6-COO-R2-OH (4B). In the formulae, R1to R3are each a long-chain bivalent saturated aliphatic group optionally bearing a functional group; R4to R6are each H or a methyl group; and Rf is represented by formula (2).

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