The present invention simplifies the hand file by simply pressing the head of the upper dental handpieces at the touch of a button can be replaced and can shorten the treatment time, while the file is moved continuously and at the same time turning the hand continuously in the horizontal direction in the vertical direction can be removed to increase the efficiency, according to the neural tube has been deleted the inside as well as to prevent the file from being fractured hand is one of the handpiece for root canal so. The handpiece is provided with one side of the body being provided with a head at the front of the body and the body of the inside of the handpiece is provided with a rotary shaft rotatably extending through the head-side for endodontic treatment according to an embodiment of the present invention and a member, located inside the said head being formed, which has a built-in installation space and the casing member which is vertical and rotational movement, depending on whether the rotation of the rotating shaft end of the rotary shaft on an outer peripheral side is connected, in the installation space doedoe bond multiple top is moved resiliently in the vertical position projecting outwardly of the installation space when the pressing member and the casing, and interlocked with the vertical rotational movement of the casing members and there is formed inside the mounting space provided on the outer periphery a vertical moving member is moved into and out of the fixture mounting space according to whether the vertical movement of the detachably mounted in the installation space with the movement whether the distal end of the fixture features a sharp file vertical and rotation of the housing member When this interlocking movement, and is characterized in that it comprises a hand file to delete a member inside the neural tube.본 발명은 치과용 핸드피스의 헤드 상부를 원터치 방식으로 가압하는 것만으로 핸드파일을 간편하게 교체할 수 있어 시술시간을 단축할 수 있으며, 핸드파일이 좌우 방향으로 연속 회동 됨과 동시에 상하방향으로 연속 이동되면서 신경관 내부를
