Patent ID: 8268421

Claim:
A packaging bag with a moisture absorption indicator function, characterized in that: the packaging bag comprises a first packaging material and a second packaging material joined together while an article storage space being formed therebetween; at least the first packaging material out of the first and second packaging materials includes a transparent barrier film disposed on an outermost side thereof, the transparent barrier film having a barrier property against water vapor; the second packaging material includes a light-reflective or light-absorbing film and a pattern printed layer disposed on a bag interior side of the light-reflective or light-absorbing film, the pattern printed layer including a moisture absorption indicator pattern; and at least one of the first and second packaging materials includes a desiccant-containing resin film that becomes transparent due to moisture absorption, the desiccant-containing resin film being overlaid on a part or the whole of the bag interior side of said at least one of the first and second packaging materials.