NOVELTY - A coating liquid containing resin containing hydroxyl group as main component, a polyisocyanate compound, ultraviolet absorber having absorption maximum of 340-400 nm, and solvent, is coated on a polycarbonate base material, and hardened to form weatherproofing layer (61) on the polycarbonate base material to obtain transparent protective sheet (6). The hydroxyl value of resin containing hydroxyl group is 18-100 mg/g. The solvent is mixture of main solvent and additive solvent, or main solvent. The application quantity of the coating liquid is 3-15 g/m2.    USE - Manufacture of transparent protective sheet used for solar cell module (claimed) used in outdoors.    ADVANTAGE - The method efficiently provides transparent protective sheet having excellent weather resistance, solvent resistance, and adhesiveness with respect to base material layer.    DETAILED DESCRIPTION - A coating liquid containing resin containing hydroxyl group as main component, a polyisocyanate compound, ultraviolet absorber having absorption maximum of 340-400 nm, and solvent, is coated on a polycarbonate base material, and hardened to form weatherproofing layer on the polycarbonate base material to obtain transparent protective sheet. The hydroxyl value of resin containing hydroxyl group is 18-100 mg/g. The ratio of isocyanate value of polyisocyanate compound with respect to hydroxyl value of resin containing hydroxyl group, is 0.5-4. The content of ultraviolet absorber is 1-20 parts mass with respect to 100 parts mass of resin containing hydroxyl group. The solvent is mixture of main solvent and additive solvent, or main solvent. The solubility parameter of main solvent is 19.3-20.3. The content of main solvent is 50-100 parts mass, with respect to 100 parts mass of total content of solvent. The solubility parameter of additive solvent is 22 or more. The content of additive solvent is 0-50 parts mass with respect to 100 parts mass of total content of solvent. The application quantity of the coating liquid is 3-15 g/m2. An INDEPENDENT CLAIM is included for solar cell module, which has the transparent protective sheet arranged such that the weatherproofing layer is exposed to the outer surface and/or back surface of the solar cell module.    DESCRIPTION OF DRAWING(S) - The drawing shows a sectional view of laminated structure of transparent protective sheet for solar cell module.    Transparent protective sheet (6)    Base material layer (60)    Weatherproofing layer (61)