SEALING MATERIAL FOR SOLAR CELL

The present invention provides an encapsulating material for solar cell, which is superior in transparency, flexibility, heat resistance and adhesiveness and can remarkably improve production efficiency of a solar cell module even when no organic peroxide is used, and exhibits a performance capable of corresponding to the thickness reduction of the solar cell element even when an organic peroxide is used, and a solar cell module using the same. According to the present invention, an encapsulating material for solar cell comprising laminated adhesive and heat resistant layer (A) and buffering layer (B), wherein a difference in flexural modulus between the heat resistant layer (A) and the buffering layer (B) is at least 30 MPa or more, is provided. A preferable embodiment of the adhesive and heat resistant layer (A) is an olefin polymer (a) having a melting point (according to JIS K7121) of 75°C or higher and a storage elastic modulus at 150°C of 10 3 Pa or more. Also, a preferable embodiment of the buffering layer (B) is an olefin polymer (d) having a stiffness of 100 MPa or less.