PROBLEM TO BE SOLVED: To provide a drill for drilling capable of suppressing a situation in which a tissue (nerve or the like) is damaged after drilling, and capable of highly accurate drilling by suppressing blurring, and an operation control device thereof. SOLUTION: A projecting blade 2A, which partially projects along the outer periphery of the tip of a drill 1 for drilling, is provided, and driving means 30 for driving the drill 1 for drilling and rotation of the drill 1 for drilling. A detection unit 22 that detects that a bone has been drilled and a control unit 20 that controls the rotation direction/rotational speed of the drill 1 for drilling and the cutting depth are provided, and the control unit 20 has the tip side of the protruding blade 2. The depth of grinding is controlled by using the set height from H1 to the base end side H3, and the rotation direction and rotation speed of the drill 1 for drilling are controlled. [Selection diagram]【課題】 穿孔後の組織（神経等）を損傷させる事態を抑制できるとともに、ブレが抑制されて高精度な穿孔が可能な穿孔用ドリル及びその操作制御装置を提供する。【解決手段】 穿孔用ドリル１の先端部の外周に沿って一部突出する突出刃２Ａが設けられており、穿孔用ドリル１を回転駆動させる駆動手段３０と、穿孔用ドリル１を回転させて骨を穿孔したことを検出する検出部２２と、穿孔用ドリル１の回転方向・回転速度や切削する深さを制御する制御部２０を備え、前記制御部２０は、前記突出刃２の先端側Ｈ１から基端側Ｈ３までの設定高さを利用して研削の深さを制御するとともに、穿孔用ドリル１の回転方向・回転速度を制御する。【選択図】 図６
