NOVELTY - A gas-barrier film has synthetic resin film (10) and gas-barrier resin layer (30) formed by radically-polymerizing radically-polymerizable group of reaction product, and radically-polymerizable group of hydrolyzate of alkoxysilane (A), dehydration-condensing silanol group of hydrolyzate of alkoxysilane (A), and irradiating active-energy ray to coating composition. The coating composition contains reaction product formed from isocyanate group of polyisocyanate compound and isocyanate reactive group of radically polymerizable monomer, and hydrolyzate of alkoxysilane (A).    USE - Gas-barrier film. Uses include but are not limited to packaging bag foodstuffs and pharmaceuticals, liquid crystal display panel, organic electroluminescent element and solar cell module.    ADVANTAGE - The gas-barrier film has excellent gas-barrier property over long period of time.    DETAILED DESCRIPTION - A gas-barrier film has gas-barrier resin layer laminated on a synthetic resin film. The gas-barrier resin layer is formed by performing radical polymerization of radically-polymerizable group of reaction product, and radically-polymerizable group of hydrolyzate of alkoxysilane (A), dehydration-condensing silanol group of the hydrolyzate of alkoxysilane (A), and irradiating an active-energy ray to coating composition. The coating composition contains reaction product formed by reacting isocyanate group of polyisocyanate compound and isocyanate reactive group of radically polymerizable monomer, and hydrolyzate of alkoxysilane (A). The hydrolyzate of alkoxysilane (A) is obtained by mixing (in parts weight) alkoxysilane (A) (100) having 2 or more alkoxy groups and 1 or more radical polymerizable group in a molecule, and water (5-50), and carrying out hydrolysis reaction of the alkoxy group and silanol group. The content of polyisocyanate compound and radically polymerizable monomer with respect to hydrolyzate of alkoxysilane (A) is 1-300 parts weight and 1-400 parts weight, respectively. An INDEPENDENT CLAIM is included for manufacture of gas-barrier film.    DESCRIPTION OF DRAWING(S) - The drawing shows schematic view of gas-barrier film.    Synthetic resin film (10)    Inorganic-compound film (20)    Gas-barrier resin layer (30)