PACKAGING BAG AND PACKAGE

To provide a packaging bag which can obtain good steam barrier property irrespective of a kind of an article to be tightly sealed, and further, to provide a package which tightly seals the article by use of such a packaging bag.SOLUTION: A packaging bag which is used for accommodation of an article, comprises a heat seal layer, a base material film layer, a metal atom-containing inorganic layer, a polyvinylidene chloride-containing layer, and a protective film layer in this order from an inner surface side of the bag. A water vapor permeability of the packaging bag is 0.8 [g/mday] or less when calcium chloride is inputted into the packaging bag, and the packaging bag is tightly sealed and is placed during 72 hours in an environment with a temperature of 40 plus or minus 2 degrees centigrade and a humidity of 90 plus or minus 5 percent RH, and a water...