A four-odor-sealing bag comprising an inner layer and an outer layer each of which comprises polyethylene or an ethylene-based copolymer, and an intermediate layer comprising a barrier resin, wherein the inner and the outer layers each contain an antiblocking agent and a surface active agent, the amount of the antiblocking agent contained in each of the inner layer and the outer layer is not less than 6500 ppm, the amount of the surface active agent contained in each of them is in the range of 1000 to 8000 ppm, the thickness of the intermediate layer is in the range of 0.8 to 5.0 μm, the total thickness of all of the layers is in the range of 10 to 30 μm, the four-odor-sealing bag is a co-extrusion inflation product and has the bottom of the four-odor-sealing bag is sealed by fusion bonding, and in the use of the four-odor-sealing bag, a non-fusion bonded opening is tied closed to seal in the contents.