A focusing type ultrasonic wave comprising a casing and a flexible film disposed on the casing, the casing being internally provided with an emitter, wherein the casing has an opening communicating with the inside and the outside of the casing； and a closing member, The closure member includes a bidirectional waterproof breathable membrane for closing the opening, and the two opposite surfaces of the waterproof gas permeable membrane correspond to the interior and exterior of the housing, respectively. Thereby, the gas inside the casing expands through the Teflon film to the outside of the casing, and when the pressure inside the casing is reduced, the external gas can penetrate into the casing through the Teflon membrane to balance the ultrasonic probe. The pressure and avoid soft film depression.一種聚焦型超音波，包括一殼體以及一軟性薄膜設置於該殼體，該殼體內部設有一發射器，其中，該殼體具有一開口連通該殼體內部與外部；以及一封閉件，該封閉件包括一雙向的防水透氣膜，該封閉件用以封閉該開口，防水透氣膜的兩相背對表面分別對應殼體內部與外部。藉此，殼體內部的氣體膨脹時透過鐵氟龍膜到該殼體外部，在殼體內部的壓力減小時，外部的氣體可透過鐵氟龍膜進入殼體中，以平衡超音波探頭內的壓力，且避免軟性薄膜凹陷。
