The purpose of the present invention is to provide a device for cleaning pulp canals of teeth, which can improve detergency and significantly reduce washing time. A device for cleaning pulp canals of teeth (10) comprises: a fastening unit (11) fastened to be separable on an oscillating body； a cleaning unit (15) inserted into pulp canals of teeth to clean pulp canals of teeth； and an elastic connecting unit (18) elastically connecting the cleaning unit (15) to the fastening unit (11).본 발명의 치근관 세정기구(10)는 진동체에 분리 가능하게 체결되는 체결부(11)와, 치근관 속에 삽입되어 치근관을 세정하기 위한 세정부(15)와, 세정부(15)를 체결부(11)에 탄성적으로 연결하기 위한 탄성연결부(18)를 포함한다.
