NOVELTY - A sealing material sheet (1) comprises a multilayer sheet containing an intermediate layer (11) and outermost layer (12). The intermediate layer contains the base resin containing low density polyethylene having density of 0.870-0.910 g/cm3, and a crosslinking agent. The outermost layer contains adhesive copolymer resin formed by copolymerizing comonomer including base resin comprising low density polyethylene, low density polyethylene and other adhesive resin, and crosslinking agent. The intermediate layer does not contain adhesive copolymer resin.    USE - Sealing material sheet is used for solar cell module (claimed).    ADVANTAGE - The sealing material sheet has excellent adhesiveness, transparency, flexibility, and heat resistance, and reduced usage amount of adhesive copolymer resin.    DETAILED DESCRIPTION - A sealing material sheet comprises a multilayer sheet containing an intermediate layer and outermost layer. The intermediate layer contains the base resin containing low density polyethylene having density of 0.870-0.910 g/cm3, and a crosslinking agent. The outermost layer contains adhesive copolymer resin formed by copolymerizing comonomer including base resin comprising low density polyethylene, low density polyethylene and other adhesive resin, and crosslinking agent. The intermediate layer does not contain adhesive copolymer resin. The content of the adhesive copolymer resin is 8 parts mass or more with respect to 100 parts mass resin components containing base resin and adhesive copolymer resin. The content of the crosslinking agent is 0.3-2 parts mass with respect to 100 parts mass resin components of the intermediate layer and the outermost layer. An INDEPENDENT CLAIM is included for solar cell module, which comprises solar cell module sealing material sheet as sealing material layer.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of sealing material sheet.    Sealing material sheet (1)    Intermediate layer (11)    Outermost layer (12)