Abstract: A gas barrier film includes a first base material film made of a plastic material and a coating layer formed on one of surfaces of the first base material film, the coating layer contains a watersoluble polymer and a water-swelling mica, the solid content ratios of the water-swelling mica in 5 a total solid content of the coating layer are within approximate ranges indicated from 20 mass % to 50 mass %, the mean area diameter of the water-swelling mica is within approximate ranges indicated from 0.5 ?m to 5 ?m, and the thickness of the coating layer is within approximate ranges indicated from 0.1 ?m to 1 ?m.

Abstract: A gas barrier film comprises a first base material film made of a plastic material and a coating layer formed on one of surfaces of the first base material film, the coating layer contains a water-soluble polymer and a water-swelling mica, the solid content ratios of the water-swelling mica in a total solid content of the coating layer are within approximate ranges indicated from 20 mass % to 50 mass %, the mean area diameter of the water-swelling mica is within approximate ranges indicated from 0.5 ?m to 5 ?m, and the thickness of the coating layer is within approximate ranges indicated from 0.1 ?m to 1 ?m.