NOVELTY - A back-surface protection sheet (V) consists of a weather-resistant resin layer, a plastic film, and an adhesive bond layer of film thickness (t). The weather-resistant resin layer forms one surface of the protection sheet, and the adhesive bond layer forms the other surface. The weather-resistant resin layer is formed using a composition containing an acrylic type copolymer having a glass transition temperature of 0-50 degrees C, a polyisocyanate compound, a black pigment, and particles other than the black pigment.    USE - Back-surface protection sheet is used for solar cell modules (claimed).    ADVANTAGE - The back-surface protection sheet has excellent abrasion resistance, economical efficiency, heat-and-moisture resistance, water-vapor barrier property, and weather resistance, and provides solar-cell modules having excellent photoelectric conversion efficiency.    DETAILED DESCRIPTION - A back-surface protection sheet consists of a weather-resistant resin layer, a plastic film, and an adhesive bond layer of film thickness (t). The weather-resistant resin layer forms one surface of the protection sheet, and the adhesive bond layer forms the other surface. The weather-resistant resin layer is formed using a composition containing an acrylic type copolymer having a glass transition temperature of 0-50 degrees C, a weight average molecular weight of 30000-150000, a hydroxyl value of 2-100 mg potassium hydroxide/g, and an aromatic-ring content of 50 wt.% or less, a polyisocyanate compound having 0.1-5 isocyanate groups with respect to one hydroxyl group of copolymer, a black pigment, and particles (A) having an average particle diameter of 5-100 nm other than the black pigment, and optionally having a melting point of 120 degrees C or more. An INDEPENDENT CLAIM is included for solar-cell module consisting of a surface sealing sheet (I) located in the light-receiving surface side of a solar cell, a sealing material layer (II) located in the light-receiving surface side of the solar cell, a photovoltaic cell (III), a sealing agent layer (IV) located in the non-light-receiving surface side of the solar cell, and the back-surface protection sheet contacting the non-light-receiving surface side sealing agent layer.    DESCRIPTION OF DRAWING(S) - The drawing shows a cross-sectional view of the solar-cell module.    Surface sealing sheet (I)    Sealing material layer (II)    Photovoltaic cell (III)    Sealing agent layer (IV)    Back-surface protection sheet (V)