An encapsulating material for solar cell that is capable of suppressing the corrosion of metal and the occurrence of yellowing at a high temperature and has excellent long-term reliability in a constant temperature and humidity is provided.The encapsulating material for solar cell of the invention contains an ethylene/α-olefin copolymer, a hindered amine-based light stabilizer, a hindered phenol-based stabilizer, and a phosphorous-based stabilizer as essential components.