NOVELTY - A multilayer sheet is obtained by laminating contact bonding layer (L4) on surface(s) of layer (L1) containing block copolymer hydride (H1). The contact bonding layer (L4) comprises block copolymer hydride (H2) obtained by hydrogenating unsaturated bonds derived from strand-shaped conjugated diene compound in block copolymer (C2) containing polymer blocks (a) having repeating unit derived from aromatic vinyl compound and polymer block(s) (b) having repeating unit derived from strand-shaped conjugated diene compound, block copolymer hydride (H3) and silane compound (H4).    USE - Multilayer sheet is used for sealing solar-cell element (claimed) for crystalline silicon solar-cell module.    ADVANTAGE - The multilayer sheet has favorable adhesive force with glass, even when exposed to high-temperature and high-humidity environment for long period of time.    DETAILED DESCRIPTION - A multilayer sheet is obtained by laminating contact bonding layer (L4) on single surface or both surfaces of layer (L1) containing block copolymer hydride (H1) obtained by hydrogenating 90% or more unsaturated bonds in block copolymer (C1) containing 2 or more polymer blocks (A) having a repeating unit derived from an aromatic vinyl compound as a main component, and polymer block(s) (B) having a repeating unit derived from a strand-shaped conjugated diene compound as a main component. The weight ratio of polymer block (A) with respect to whole block copolymer (C1) and polymer block (B) with respect to whole block copolymer (C1) is 30:70-60:40. The contact bonding layer (L4) comprises block copolymer hydride (H2) obtained by hydrogenating 90% or more unsaturated bonds derived from strand-shaped conjugated diene compound in block copolymer (C2) containing 2 or more polymer blocks (a) having a repeating unit derived from an aromatic vinyl compound as a main component, and polymer block(s) (b) having a repeating unit derived from a strand-shaped conjugated diene compound as a main component, block copolymer hydride (H3) obtained by introducing a dicarboxylic anhydride group into block copolymer hydride (H2), and silane compound (H4) having an epoxy group and alkoxy silyl group in a molecule. The block copolymer hydride (H3) has dicarboxylic anhydride group. The ratio of polymer blocks (a) with respect to whole block copolymer (C2) and polymer blocks (b) with respect to whole block copolymer (C2) is 20:80-60:40. An INDEPENDENT CLAIM is included for sealing method of solar-cell element (2), which involves arranging the multilayer sheet, such that a glass surface is contacted with the contact bonding layer (L4).    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of the crystalline silicon solar-cell module containing the multilayer sheet.    Transparent front substrate (1)    Solar-cell element (2)    Sealing material (3)    Wiring (4)    Back surface protection sheet (5)