NOVELTY - A gas-barrier film consists of synthetic resin film (10) and gas-barrier resin layer (30). Gas-barrier resin layer is obtained by mixing alkoxysilanes (A) having alkoxy groups and radical polymerizable group(s) and water, obtaining hydrolyzate of alkoxysilane (A) having silanol group, obtaining coating composition by adding urethane (meth)acrylates (B) and polyfunctional (meth)acrylate (C), applying coating composition on synthetic resin film, performing polymerization of (meth)acryloxy groups of component (B) and component (C) and performing dehydrate-condensation of silanol group.    USE - Gas-barrier film. Uses include but are not limited to packaging bag of foodstuffs, pharmaceuticals, solar cell module element, liquid crystal display panel element and organic electroluminescence display panel element.    ADVANTAGE - The film has excellent adhesiveness, long-term transparency, and long-term gas-barrier property to oxygen and steam.    DETAILED DESCRIPTION - A gas-barrier film consists of synthetic resin film and gas-barrier resin layer integrally laminated on synthetic resin film. The gas-barrier resin layer is obtained by mixing 100 pts. wt. alkoxysilanes (A) having 2 or more alkoxy groups and radical polymerizable group(s) in a molecule and 5-50 pts. wt. water, obtaining hydrolyzate of alkoxysilane (A) having silanol group by carrying out hydrolysis of alkoxy group, coating composition by adding 100-2000 pts. wt. urethane (meth)acrylate (B) and 1-50 pts. wt. polyfunctional (meth)acrylate (C), applying coating composition on synthetic resin film by irradiating an active energy ray, radical polymerization of (meth)acryloxy group of urethane (meth)acrylate (B) and (meth)acryloxy group of polyfunctional (meth)acrylate (C) and carrying out dehydrate condensation of silanol group in the hydrolyzate of alkoxysilane (A). The polyfunctional (meth)acrylate (C) does not have urethane bond in molecule. 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)