Denture fixing attachment

Provided is a denture fixing attachment including: a rod-shaped joint member, having an upper end for supporting a denture fixed thereto and a locking protruding portion protruding laterally from a lower portion of the joint member; and an abutment having a coupling portion formed in an outer surface of a lower portion thereof so as to be coupled to a fixture recess formed in the fixture, and a receiving portion formed in an upper portion thereof so as to receive the lower portion of the joint member therein, wherein the receiving portion of the abutment includes a receiving recess for receiving the lower portion of the joint member inserted thereinto, and a stop protruding portion provided in the receiving portion above the receiving recess and having a guide groove disposed adjacent to the stop protruding portion for guiding coupling movement of the locking protruding portion fitted thereinto.