NOVELTY - A gas-barrier laminated film is formed by laminating a primer layer (2), a gas barrier layer (3), and a gas barrier film layer (4) on a base material layer (1). The primer layer consists of acrylic polyol, isocyanate, and a silane coupling agent. The gas barrier layer consists of silicon oxide. The gas barrier film layer is formed using a liquid containing silicon compound(s) and a water-soluble polymer having a hydroxyl group. The primer layer has a film thickness of 0.005-1 mu m and the gas barrier layer has a film thickness of 0.005-2 mu m.    USE - Gas-barrier laminated film is used for packaging materials of foodstuffs, daily necessaries, pharmaceuticals, solar-cell components, and electronic-device components, and for back-surface protection sheets of solar cell modules, and surface protection sheets of electronic paper and flat panel displays.    ADVANTAGE - The gas-barrier laminated film has excellent transparency and gas-barrier property.    DETAILED DESCRIPTION - A gas-barrier laminated film is formed by laminating a primer layer, a gas barrier layer, and a gas barrier film layer on one surface of a base material layer consisting of a transparent plastic film. The primer layer consists of acrylic polyol, isocyanate, and a silane coupling agent. The gas barrier layer consists of silicon oxide. The gas barrier film layer is formed by applying a liquid containing silicon compound of formula: Si(OR1)4 and/or its hydrolyzate, silicon compound of formula: (R2Si(OR3)3)n and/or its hydrolyzate, and a water-soluble polymer having a hydroxyl group, and drying. The primer layer has a film thickness of 0.005-1 mu m, the gas barrier layer has a film thickness of 0.005-2 mu m, and the gas barrier film layer has a film thickness of 0.05-3 mu m. The product of thickness of gas barrier layer and thickness of gas barrier film layer is 0.001-2.    R1,R3=CH3, C2H5 or C2H4OCH3;    R2=organic functional group;and    n=1 or more.    DESCRIPTION OF DRAWING(S) - The drawing shows a sectional view of the gas-barrier laminated film.    Base material layer (1)    Primer layer (2)    Gas barrier layer (3)    Gas barrier film layer (4)