TECHNOLOGY FOCUS - POLYMERS - Preferred Composition: The layer (A) is comprised of an olefin polymer having melting point of 75degreesC or more measured based on JIS K7121 and storage elastic modulus of 103 Pa or more at 150degreesC. A silane coupling agent is blended with the olefin polymer. The olefin polymer is ethylene-polar monomer copolymer (b). The copolymer (b) is ethylene-unsaturated carboxylic acid copolymer having unsaturated carboxylic acid unit content of 4 wt.% or more, and its ionomer. The olefin polymer is non-crystalline or low crystalline alpha-olefin polymer (c). The olefin polymer is a polymer or copolymer of 2-10C alpha-olefin. The olefin polymer is alternately random copolymer with alpha-olefin containing propylene. The solar cell sealing material contains a resin composition containing 50-0 wt.pts of crystalline alpha-olefin polymer (f) and olefin polymer (d) containing 50-100 wt.pts of non-crystalline alpha-olefin polymer (e). Preferred Properties: The solar cell sealing material has crystallinity degree by X-ray of 5% or more. The buffer layer has bending rigidity rate of less than 100 MPa. Polymer (e) has 20 mol% or more of polymer unit based on 3-20C alpha-olefin, melting peak based on differential scanning calorimeter and ratio of weight average molecular weight to number average molecular weight of 5 or less. The adhesive strength of layer (A) and protective layer is 3 N/10 mm or more. Preferred Polymer: The olefin copolymer (d) is chosen from ethylene-vinyl acetate copolymer, ethylene-unsaturated carboxylic acid ester copolymer, ethylene-unsaturated carboxylic acid copolymer, its ionomer and non-crystalline or low crystalline alpha-olefin copolymer, preferably ethylene-unsaturated carboxylic acid ester copolymer comprising unsaturated carboxylic acid ester unit content of 10-40 wt.%, and melting point (T, in degreesC) based on JIS K7121 and unsaturated carboxylic acid ester unit content (X, in mol%) satisfying a relation: -3X+125greater than or equal toTgreater than or equal to-3X+109. The copolymer (d) contains a cross-linking agent and silane coupling agent. EXAMPLE - A sealing material composition was prepared by blending ethylene-methacrylic acid copolymer (with 25 wt.% of vinyl acetate unit content, 2 g/10 minutes of melt flow rate measured at 190degreesC and 2.160 g load), and KBM603 (RTM: N-beta(amino ethyl)-gamma-aminopropyl trimethoxy silane) (silane coupling agent). The sealing material produced using the composition, had excellent transparency, flexibility, heat resistance and adhesiveness.