NOVELTY - A solar cell back surface protection sheet has weather-resistant resin layer, plastic film and adhesive bond layer. The weather-resistant resin layer is formed using resin composition comprising acryl-type copolymer (A), polyisocyanate compound (B), white pigment (C), and particles (D). Particles (D) optionally have melting point of 120 degrees C or more. The component (A) has glass transition temperature of 0-50 degrees C, weight average molecular weight of 30000-150000, hydroxyl value of 2-100 mg potassium hydroxide and aromatic ring content of 50 wt.% or less.    USE - Solar cell back surface protection sheet is used for solar cell module (claimed).    ADVANTAGE - The solar cell back surface protection sheet has excellent abrasion resistance, heat-and-moisture resistance and weather resistance, and is economical.    DETAILED DESCRIPTION - A solar cell back surface protection sheet has weather-resistant resin layer, plastic film and adhesive bond layer having thickness of t mu m. The weather-resistant resin layer is formed on one surface of the solar cell back surface protection sheet, and the adhesive bond layer formed on other surface of the solar cell back surface protection sheet. The weather-resistant resin layer is formed using a resin composition comprising acryl-type copolymer (A), polyisocyanate compound (B), white pigment (C) having average particle diameter of 200-400 nm, and particles (D) having average particle diameter of 5-10 nm. The particles (D) optionally have melting point of 120 degrees C or more. The component (A) has glass transition temperature of 0-50 degrees C, weight average molecular weight of 30000-150000, hydroxyl value of 2-100 mg potassium hydroxide and aromatic ring content of 50 wt.% or less. The number of isocyanate groups in component (B) is 0.1-5 with respect to one hydroxyl group in component (A). An INDEPENDENT CLAIM is included for solar cell module, which has solar cell surface sealing sheet (I) located in the light-receiving surface of solar cell, sealing material layer (II), located in the light-receiving surface of solar cell, photovoltaic cell (III), sealing agent layer (IV) located in the non-light-receiving surface of solar cell, and solar cell back surface protection sheet. The adhesive bond layer of solar cell back surface protection sheet is in contact with sealing agent layer.