The utility model relates to a space bag plug used for cultivating mushrooms.For a space bag,The space bag has an outer bag.The outer bag is provided with an opening.And the plug of the space bag for cultivating mushrooms,Including: a cover body,Having a top surface and an outer wall connected,The top surface and the outer wall are surrounded by a holding groove.The top surface has a convex part protruding toward the holding groove.The outer wall is provided with a convex rib and a through hole.The rib is convex toward the holding groove.The through hole is arranged on the outer wall；One ring body.It is sheathed in the outer bag and contained in the holding groove.The ring is against the convex part and rib；A sponge.Installed in the tank；In this way,The cap and ring of this case have certain shape.It is easy to cooperate with the processing machine.And then improve the lack of low learning efficiency.本新型為一種用於培育菇類的太空包之塞蓋，適用於一太空包，該太空包具有一外袋，該外袋上開設有一開口，而該用於培育菇類的太空包之塞蓋，包含：一蓋體，具有連接的一頂面及一外壁，該頂面及該外壁共同圍繞出一容置槽，該頂面具有一凸部朝向該容置槽內凸設，該外壁具有一凸肋以及一通孔，該凸肋朝向該容置槽內凸設，該通孔開設於該外壁上； 一環體，套設於該外袋並容置於該容置槽內，該環體抵頂於該凸部及該凸肋；一海綿，裝設於該容室槽內；藉此，本案的蓋體及環體具有一定的型態，易於與加工機互相配合，進而改善習知效率較低的缺失。
