PHOTOCURABLE RESIN COMPOSITION, FUEL CELL, AND SEALING METHOD

A photocurable resin composition contains: components (A) to (C) below. The mass ratio (b2/b1) of a component (b1) below and a component (b2) below is from 1.0 to 5.0. The component (b2) is contained in an amount of 10 to 65 parts by mass relative to 100 parts by mass of the component (A). Component (A) is a polyisobutylene resin containing one or more (meth)acryloyl groups and a —[CHC(CH)]— unit. Component (B) is (b1) an acrylate monomer having an alicyclic hydrocarbon group having 5 to 25 carbon atoms and (b2) an acrylate monomer having a linear or branched alkyl group having 5 to 30 carbon atoms. Component (C) is a photoradical polymerization initiator.