NOVELTY - A gas-barrier film consists of a gas-barrier layer (2) provided on the surface of a polymer film base material (1). The gas-barrier layer contains zinc oxide and silicon dioxide. The atomic ratio of zinc with respect to silicon contained in the gas-barrier layer is 0.1-1.5. The structure density index of the gas-barrier layer is 1.2-1.4, which is the ratio of density of gas-barrier layer calculated by X-ray reflectance method with respect to theoretical density of gas-barrier layer calculated from the composition ratio by X-ray photoelectron spectroscopy method.    USE - Gas-barrier film is used for packaging of foodstuff, pharmaceuticals, and electronic components used in solar cell, electronic paper, and organic electroluminescent display device.    ADVANTAGE - The gas-barrier film has excellent gas-barrier property, flexibility, and transparency.    DETAILED DESCRIPTION - A gas-barrier film consists of a gas-barrier layer provided on the surface of a polymer film base material. The gas-barrier layer contains zinc oxide and silicon dioxide. The ratio of spectral intensity at 9664 eV with respect to spectral intensity at 9668 eV in X-ray absorption near edge structure spectrum of zinc K-absorption edge in the gas-barrier layer is 0.91-1. The atomic ratio of zinc with respect to silicon contained in the gas-barrier layer is 0.1-1.5. The structure density index of the gas-barrier layer is 1.2-1.4, which is the ratio of density of gas-barrier layer calculated by X-ray reflectance method with respect to theoretical density of gas-barrier layer calculated from the composition ratio by X-ray photoelectron spectroscopy method. The ratio of integrated intensity of spectrum having peak at 920 cm-1 with respect to integrated intensity of spectrum having peak at 1080 cm-1 is 1-7, when a peaked portion separates peak having wavenumber of 900-1 at 100 cm-1 into peak having wavenumber at 920 cm-1 and 1080 cm-1. An INDEPENDENT CLAIM is included for manufacture of gas-barrier film.    DESCRIPTION OF DRAWING(S) - The drawing shows the cross-sectional view of gas-barrier film.    Polymer film base material (1)    Gas-barrier layer (2)