A package of the present invention includes a bag made from flexible superimposed double film (W;2 and 3) with a space (4) between the oxygen-barrier outside film (2) and the permeable-to-oxygen inside film (3) in which discoloring and degenerative items for packing and a mixed gas composed of oxygen and bacteriostatic gas are hermetically enclosed. The package is made from a superimposed double film prepared in advance, using a pillow packing machine. <IMAGE> <IMAGE>
