NOVELTY - A back surface protection sheet (6) comprises base material layer (60) which consists of resin (A) containing modified polyphenylene ether as main ingredient, weather-resistance coating layer (61) currently formed on the outermost surface of the back surface protection sheet, and intermediate layer (62) formed between base material layer and weather-resistance coating layer. The weather-resistance coating layer contains resin (B) having hydroxyl group, and hardening agent containing polyisocyanate compound. The hydroxyl value of weather-resistance coating layer is 18-100.    USE - Back surface protection sheet is used for solar cell module (claimed).    ADVANTAGE - The back surface protection sheet has excellent weather resistance, adhesiveness, printability and solvent resistance, and is economical.    DETAILED DESCRIPTION - A back surface protection sheet comprises base material layer which consists of resin (A) containing modified polyphenylene ether as main ingredient, weather-resistance coating layer currently formed on the outermost surface of the back surface protection sheet, and intermediate layer formed between base material layer and weather-resistance coating layer. The weather-resistance coating layer contains resin (B) having hydroxyl group, and hardening agent containing polyisocyanate compound. The hydroxyl value of weather-resistance coating layer is 18-100. The content of polyisocyanate compound having cyanate group with respect to 100 parts mass resin (B) is 0.8-14 parts mass. The intermediate layer is formed by mixing resin (A) and resin (B). INDEPENDENT CLAIMS are included for the following:    (1) solar cell module, which has sealing material sheet, solar cell element and back surface protection sheet; and    (2) manufacture of back surface protection sheet, which involves coating a liquid containing resin (B), polyisocyanate compound and solvent on the surface of base material layer, and forming weather-resistance coating layer.    DESCRIPTION OF DRAWING(S) - The drawing shows a sectional view of the back surface protection sheet.    Back surface protection sheet (6)    Base material layer (60)    Weather-resistance coating layer (61)    Intermediate layer (62)