Encapsulating material for solar cell and solar cell module

A solar cell module comprising:

• a transparent surface protective member;
• a back surface protective member;
• a solar cell element;
• and
• an encapsulating layer for encapsulating said solar cell element between said transparent surface protective member and said back surface protective member to be formed by crosslinking an encapsulating material for solar cell,
• wherein the encapsulating layer is in direct contact with at least one side of the solar cell element, and
• the encapsulating material for solar cell comprises an ethylene/α-olefin copolymer satisfying the following requirements (a1) to (a4) and (a11):
• (a1) the content ratio of structural units derived from ethylene is from 80 to 90 mol % and the content ratio of structural units derived from α-olefin having 3 to 20 carbon atoms is from 10 to 20 mol %;
• (a2) MFR is equal to or more than 2 g/10 minutes and less than 10 g/10 minutes as measured under the conditions of a temperature of 190 degrees centigrade and a load of 2.16 kg in accordance with ASTM D1238;
• (a3) the density is from 0.865 to 0.884 g/cm3 as measured in accordance with ASTM D1505;
• (a4) the shore A hardness is from 60 to 85 as measured in accordance with ASTM D2240;
• and
• (a11) the extracted amount of said ethylene/α-olefin copolymer in methyl acetate is equal to or less than 5.0 weight %.