This creation proposes a packaging bag with a porous membrane, which includes a bag body and a breathable portion. The bag body has a receiving space. The air-permeable portion is provided in the bag body. The air-permeable portion has a porous structure, and its air permeability ranges from 1 second to 1200 seconds at a Gurley value of 10 ml. The bag body is composed of air-permeable parts, because the bag body is thin and the fibers are arranged in a single direction, it is convenient to tear to obtain the contents of the bag, and the air-permeable part prevents microorganisms and water droplets from entering, so that the objects in the containing space block the growth of microorganisms .本創作提出一種具有多孔膜之包裝袋，包括一袋體及一透氣部。該袋體有一容納空間。該透氣部設置在該袋體，該透氣部呈多孔隙結構，其透氣度範圍為格雷值(Gurley value)在10毫升的標準下介於1秒至1200秒之間。藉由袋體由透氣部所組成，因袋體較薄且纖維呈單方向排列，方便撕開取得袋內物品，且該透氣部使微生物及水滴無法進入，使該容納空間內物品阻隔微生物生長。
