The present invention relates to a connection screw locking tool. The connection screw locking tool is coupled to a connection screw, wherein the screw locking tool is made of elastic metal in order to prevent an upper prosthesis from being loosened or detached by releasing of the connecting screw which connects a fixture with the upper prothesis in a dental implant. Accordingly, it is possible to prevent rotating of a connecting screw, thereby maintaining firmness of an upper prothesis which is coupled to implant..치과용 임플란트에서 매식체와 상부보철을 연결하는 연결나사의 풀어짐에 의한 상부보철물 느슨해짐이나 탈락을 막기위해 탄성이있는 금속으로 만들어진 screw locking tool 을 연결나사에 결합시킨다.이로써 연결나사의 돌아감을 막아서 임플란트에 결합된 상부보철물의 견고함을 유지할 수 있다.
