The present invention relates to a drill for an implant operation, which actively reinforces mutual coupling force between a cutting part to cut an alveolar bone and a connection part to connect the cutting part to a handpiece so as to prevent an accident. More specifically, according to the present invention, the drill for an implant operation comprises: the cutting part (10) having a plurality of cutting blades formed with a sawtooth arranged in a circular shape to perforate an alveolar bone； and the connection part (20) interposed between the handpiece and the cutting part. The cutting part (10) comprises: the sawtooth (11) arranged on the top in a circular shape； an upper cutting part (12) downwardly extended from the sawtooth； a lower cutting part (13) downwardly protruding from the upper cutting part by an enlarged diameter； and a coupling hole (14) sunk from the bottom surface of the lower cutting part to guide insertion of the connection part. The connection part (20) comprises: a coupling protrusion (21) inserted into the coupling hole of the cutting part； a step part (22) restricting an insertion depth of the coupling hole downwardly protruding from the bottom part of the coupling protrusion by an enlarged diameter； and an extended part (23) extended and protruding from the bottom surface of the step part to be connected to the handpiece. The coupling protrusion (21) has a spiral line on an outer circumference and the coupling hole (14) has a spiral groove corresponding to the spiral line of the coupling protrusion, and thus the coupling protrusion and the coupling hole are interconnected in a bolt fastening type.본 발명은 치조골을 절삭하는 절삭부와 핸드피스에 절삭부를 연결하는 연결부 간의 상호 결합력을 적극 강화시킴에 따라 안전사고를 미연에 예방할 수 있는 임플란트 시술용 드릴에 관한 것으로, 더욱 상세하게는 톱니로 이루어진 복수의 절삭날이 원형 배열되어 치조골을 천공하는 절삭부(10)；와, 핸드피스와 절삭부 사이에 개재되는 연결부(20)；로 이루어지며, 특히 위 절삭부(10)는 상단에 원형 배열되는 톱니(11)와, 톱니에서 하향으로 연장되는 절삭상부(12)와, 절삭상부에서 확장된 지름으로 하향 돌출되는 절삭하부(13)와, 절삭하부의 저면에 함몰 형성되어 연결부의 끼움을 유도하는 결합홀(14)로 이루어지고, 위 연결부(20)
