The present invention provides a denture fixing attachment comprising: a rod shaped joint member (5) a denture (4) being fixed to the upper end of the joint member (5) and an abutment (6) having a coupling portion provided on the lower portion of the outside thereof the coupling portion being coupled to a fixture groove formed on a fixture (3) and having a receiving portion on the upper portion thereof the lower portion of the joint member (5) being received in the receiving portion wherein the receiving portion of the abutment (6) comprises a receiving groove (7) into which the lower end (11) of the joint member (5) is inserted and a protruding step (10) having a guide groove (9) provided on the inside of the upper portion of the receiving groove (7) such that a protrusion (8) which protrudes from the lower end (11) of the joint member (5) outwards is fitted and simultaneously guided.
