PROBLEM TO BE SOLVED: To provide a commodity packaging bag capable of being used as an auxiliary tool for holding the commodity again, without being discarded after being opened.SOLUTION: A commodity packaging bag 1A comprises: a bag body 2A which is sealed except for an opening part 3 from which a sheet-state object P to be stored is packed; and a sealing part 4 for sealing the opening part 3, and detachably attached to the bag body 2A via an adhesive part 5. The commodity packaging bag 1A has a reusable sheet part 2A' for holding the object P to be stored by separating a part including the adhesive part 5.
