NOVELTY - A gas-barrier film (1a,1b) consists of a resin-made film base material (10), a gas-barrier layer (12) formed in the surface of film base material, and an anchor layer (11) provided between the film base material and the gas-barrier layer. The anchor layer contains an ultraviolet ray-cured resin. The difference between absolute value (tv) of displacement signal of probe measured in anchor layer and absolute value (tk) of displacement signal of probe measured in film base material made from polyethylene terephthalate is 0.15-0.5 V.    USE - Gas-barrier film is used as packaging material and sealing film for gas shutoff of electronic device e.g. electronic paper and solar cell.    ADVANTAGE - The gas-barrier film has excellent wrinkle or crack generation-proof property and deformation-proof property with respect to heat, uniform gas-barrier performance, high tensile strength, and reduced thermal expansion, and is manufactured with high yield. The occurrence of non-uniformity of discharge and floating of film base material during manufacture of gas-barrier film is suppressed.    DETAILED DESCRIPTION - A gas-barrier film consists of a resin-made film base material, a gas-barrier layer formed in the surface of film base material, and an anchor layer provided between the film base material and the gas-barrier layer. The anchor layer contains an ultraviolet ray-cured resin. The difference between absolute value (tv) of displacement signal of probe measured in anchor layer and absolute value (tk) of displacement signal of probe measured in film base material made from polyethylene terephthalate is 0.15-0.5 V, when measured by maintaining temperature of probe at 150 degrees using a nano-thermal analyzer. The absolute value (tv) of displacement signal of probe measured in anchor layer is less than the absolute value (tk) of displacement signal of probe measured in film base material. An INDEPENDENT CLAIM is included for manufacture of gas-barrier film, which involves forming gas-barrier layer on the surface of resin-made film base material, and providing the anchor layer between film base material and gas-barrier layer.    DESCRIPTION OF DRAWING(S) - The drawing shows the schematic view of the structure of gas-barrier film.    Gas-barrier film (1a,1b)    Film base material (10)    Anchor layer (11)    Gas-barrier layer (12)    Secondary gas-barrier layer (13)