PROBLEM TO BE SOLVED: To provide an electron beam-curable resin composition which can develop excellent thermal deformation resistance even in a molded article state, and to provide a resin frame for a reflector, a reflector and a semiconductor light-emitting device using the above resin composition, and a method for manufacturing a molded article using the resin composition.SOLUTION: The electron beam-curable resin composition comprises an olefin resin and a crosslinking agent. The crosslinking agent has a saturated or unsaturated ring structure, in which at least one atom in atoms constituting at least one ring is bonded to an allyl-based substituent that is one of an allyl group, a methallyl group, an allyl group via a connecting group, and a methallyl group via a connecting group. The electron beam-curable resin composition shows a storage modulus (E') of 0.1×10to 5.5×10Pa, at 270°C measured under specific measurement conditions. Also disclosed are a resin frame for a reflector, a reflector, and a semi
