The utility model relates to a water stop valve sheet of a drip container, which comprises a ring body and a diaphragm which can be integrated with the ring body. The ring body is provided with an opening, and a flange is protruded inward around the opening； and the outer circumference of the diaphragm is provided with a concave ring which can be combined with the flange of the ring body, so that the diaphragm and the ring body are integrated. The water stop valve sheet thus formed does not need to be assembled again, and not only can be produced quickly but also conform to the requirements. Meet the sanitary requirements of medical devices.一種點滴液筒之止水閥片，包括一環體及一可與環體一體成形之膜片，環體中設有一開孔，在開孔周圍向內凸設有一凸緣；而該膜片之外周則凹設有一可結合於環體凸緣之凹環，使膜片與環體兩者一體成形，藉此所構成之止水閥片不必再行組裝，不但生產快速又符合醫療用器具之衛生要求。
