To simply, easily, and surely release air in a compressed bag by preventing the front and back sheets of the bag from close adherence at the time of sucking air, regardless of the distance between the tip of a hose and a storing article in a cleaner, etc.

In a compressed bag worked by nylon or polystyrene, etc., projections are provided on the inner side of at least any one side sheet of the front or back sheets to form an air flowing groove.