NOVELTY - A gas-barrier film comprises a gas barrier layer on a base material, where the gas barrier layer has 1 area of each of an area (A), an area (C), and an area (D) orderly in thickness direction from a base material side, and absorption factor in 450 nm to be les than 15%, the area (A) comprises silicon-oxygen-carbon component, the thickness of area (A) is 20-200 nm, the area (C) comprises silicon-oxygen-nitrogen component, the thickness of area (C) is 50-1000 nm, the area (D) comprises silicon-oxygen-nitrogen component, and the thickness of the area (D) is 8-200 nm.    USE - Gas-barrier film for use in electronic device (claimed) such as an organic electroluminescence device, solar cell device, LCD device, thin-film transistor, a touchscreen and electronic paper, and packaging application for preventing a quality change of packaging of goods, such as foodstuff, industrial goods and a pharmaceutical products.    ADVANTAGE - The film has better performance, improved gas barrier property and the crack tolerance at the time of bending, improved adhesiveness and flexibility, and provides the device with excellent luminescent property, high gas-barrier property, better optical characteristic, preferably permeability, and improved durability in a high-temperature, high humidity environment, and better flexibility.    DETAILED DESCRIPTION - A gas-barrier film comprises a gas barrier layer on a base material, where the gas barrier layer has 1 area of each of an area (A), an area (C), and an area (D) orderly in thickness direction from a base material side, and absorption factor in 450 nm to be les than 15%, the area (A) comprises silicon-oxygen-carbon component (SiOlCm), the thickness of area (A) is 20-200 nm, the area (C) comprises silicon-oxygen-nitrogen component (SiOwNx), the thickness of area (C) is 50-1000 nm, the area (D) comprises silicon-oxygen-nitrogen component(SiOyNz), the thickness of the area (D) is 8-200 nm, l is 0.70-1.25, m is 0.88-1.40, w is more than 0.20, but less than or equal to 0.55, x is 0.66-0.75, y is more than 0.55, but less than or equal to 2.00, and z is more than 0.25, but less than 0.66.