An ultrasonic bone scalpel knife head capable of enlarging an exposed area by entering into a very small bone suture and polishing / grinding one side or both sides is provided. A knife head head, a knife rod, and a knife tail are provided, one end of the knife rod is connected to the knife head head, and the other end of the knife rod is connected to the knife tail. The knife tail 3 is connected to the ultrasonic apparatus main body via an ultrasonic transducer, the knife head head 1 has a flat structure, the tip surface of the flat structure has a smooth arc surface structure, and the upper surface of the flat structure. Alternatively, knurls 11 are provided on the upper and lower surfaces, and the knurls 11 extend from the tip of the flat structure to the knife rod 2 to form a flat file knife head by covering the flat structure. [Selection] Figure 2【課題】非常に小さい骨縫合糸内に進入して片側や両側研磨・研削を行って露出面積を拡大可能な超音波骨メスのナイフヘッドを提供する。【解決手段】ナイフヘッド頭部１、ナイフロッド２及びナイフテール３を備え、ナイフロッド２の一方端はナイフヘッド頭部１に接続され、ナイフロッド２の他方端はナイフテール３に接続され、ナイフテール３は超音波変換器を介して超音波装置本体に接続され、ナイフヘッド頭部１は扁平状構造をなし、扁平状構造の先端面が平滑円弧面構造をなし、扁平状構造の上面或いは上下面にローレット１１が設けられ、ローレット１１は扁平状構造の先端からナイフロッド２へ延在し、扁平状構造を覆うことで平面やすり状ナイフヘッドを形成する。【選択図】図２
