A kind of ultrasonic osteotome that can promote stock-removing efficiency, the connector and one that can be connect with a supersonic transducer comprising one are connected with the cutting unit of one end of the opposite what supersonic transducer of the what connector. The supersonic transducer can drive the moved end of making of the connector to move back and forth between an opposite first direction and a second direction. The cutting unit includes one being connected with what this making the ontology and one of moved end by the outwardly extending cutting blade of the ontology, which has a forward recess and a Hou groove towards the second direction towards the first direction. Utilize the forward recess and the Hou groove, not only can smooth scrap fallaway, can also effectively reduce cutting resistance, while keeping the flowing of cooling liquid more smoothly, and then promote stock-removing efficiency while reducing cutting temperature, substantially to shorten the speed that the overall operation time also accelerates wound to restore.一種能提升切削效率的超音波骨刀，包含一能與一超音波換能器連接的連接件，及一連設於該連接件相反於該超音波換能器之一端的切削單元。該超音波換能器能驅動該連接件的作動端在相反的一第一方向與一第二方向間往復移動。該切削單元包括一連設於該作動端的本體，及一由該本體向外延伸的切刃，該切刃具有一面向該第一方向的前凹槽，及一面向該第二方向的後凹槽。利用該前凹槽與該後凹槽，不但能順利排除切屑，也能有效減少切削阻力，同時使冷卻液體的流動更為順暢，進而提升切削效率同時降低切削溫度，以大幅縮短整體手術時間也加速傷口復原的速度。
