NOVELTY - A gas barrier film comprises gas-barrier layer including organic region(s) and inorganic region(s) on one surface of substrate film, and barrier property-having layer including barrier property-having resin as main ingredient of the layer on other surface of substrate film.    USE - The gas barrier film is used for substrate or sealing film of display devices (claimed) including organic electroluminescent device, LCD devices, touch panels, thin-film transistor imaging display devices and electronic papers. Can also be used as sealing film for solar cell devices including single crystal silicon-based solar cell devices; polycrystalline silicon-based solar cell devices; single-junction or tandem-structure amorphous silicon-based solar cell devices; gallium-arsenic, indium-phosphorus or III-V group compound semiconductor-based solar cell devices; cadmium-tellurium or II-VI group compound semiconductor-based solar cell devices; dye-sensitized solar cell devices; organic solar cell devices; or preferably copper/indium/selenium, copper/indium/gallium/selenium, copper/indium/gallium/selenium/sulfur or I-III-VI group compound semiconductor-based solar cell devices.    ADVANTAGE - The organic/inorganic laminate gas-barrier layer on one surface of film can prevent moisture penetration through the other surface without gas-barrier layer. Although the gas barrier film has organic/inorganic laminate gas-barrier layer only on one surface, the film makes it possible to prevent moisture and gas from taken into and released from substrate film, thus reducing deterioration of display device to be produced by the gas barrier film, and making it possible to stably produce display devices.    DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for production of gas barrier film comprising providing gas-barrier layer on surface of substrate film, and providing layer including a barrier property-having resin as the main ingredient of layer on other surface of substrate film.