The invention relates to a cover of a mushroom space bag, which comprises an upper cover, a base and a ventilating film. One side of the cover body of the upper cover is extended with one end of a tether, the other end of the tether is connected with a cover plate, the cover plate is closed to the top of the cover body, so that a ventilating film can be fixed in the cover without displacement, and the incomplete sealing of the ventilating film can be effectively improved. In order to reduce the production cost, it is not necessary to rely on manual work, but can completely import automatic filling work.本創作係有關於一種菇類太空包的封蓋，包含一上蓋、一底座及一透氣薄膜，其中該上蓋的蓋體一側延接一繫帶的一端，該繫帶的另端接設一蓋板，該蓋板蓋合於該蓋體頂部，藉此結構可提供一透氣薄膜固設在該封蓋內而不會移位，有效改善該透氣薄膜封合不完全的缺失，以使太空包的製作，不必仰賴人工作業，而可完全導入自動化裝填作業，以降低生產成本者。
