Resin composition, reflector, lead frame provided with reflector, and semiconductor light-emitting apparatus

Even with a molded body molded by making use of a resin composition including a large amount of pigments with respect to a polyolefin resin, by using an isocyanurate compound having a specified structure, a resin composition capable of curing even with a low amount of ionizing radiation, a reflector molded from the resin composition, a lead frame provided with the reflector, and a semiconductor light-emitting apparatus making use of the reflector are provided. The resin composition comprises a polyolefin resin, a specified isocyanurate compound, and pigments.