The present invention is an attachment for fixing a denture; a rod-like joint member 5 to which a denture 4 is fixed at the upper end; The upper part has an abutment 6 in which a lower part of the joint member 5 is accommodated. The accommodating part of the abutment 6 includes an accommodation groove 7 into which the lower end 11 of the joint member 5 is inserted; For fixing a denture comprising a protruding step portion 10 having a guide groove 9 which is provided on the inner side of the upper portion of the housing groove 7 and which is provided with a protruding portion 8 which protrudes outward from the lower end 11 of the joint member 5 and is guided. Provide attachments. [Selection] Figure 1本発明は、義歯固定用アタッチメントであって;上端に義歯4が固定される棒状のジョイント部材5と、外側下部には、フィクスチャー3に形成されたフィクスチャー溝に結合する結合部が備えられ、上部には、ジョイント部材5の下部が収容される収容部が備えられるアバットメント6とを有し、アバットメント6の収容部は、ジョイント部材5の下端11が挿入される収容溝7と、収容溝7の上部内側に設けられ、ジョイント部材5の下端11に外側に突設された突部8が嵌め込まれると共に案内される案内溝9を有する突段部10とを含んでなる義歯固定用アタッチメントを提供する。【選択図】図1