To provide a gas-permeable film applicable to the top film, peelable film, or the like of the lid material of a container for packaging an article producing gas such as food, medicine, plant, miscellaneous good, chemical, or the like.

By boring a gas-permeable thermoplastic resin film 11 in the thickness direction excluding an extremely thin film part 14 close to the surface, innumerable micropores 15 with one end closed by the film part 14 are scattered at appropriate intervals. The gas-permeable film is coated with a perforated film, or the thermoplastic resin films are piled, and the peripheries of the micropores are joined.