This solar cell sealing material contains, as essential components, an ethylene/alpha-olefin copolymer, an organic peroxide and an acid acceptor. It is preferable that the acid acceptor is composed of at least one substance that is selected from the group consisting of magnesium hydroxide, magnesium oxide, zinc oxide, trilead tetraoxide, calcium hydroxide, aluminum hydroxide, iron (II) hydroxide, calcium carbonate, and hydrotalcite compounds and/or fired products thereof.