A denture attachment 1 comprises said magnetic element delivering magnetic attraction force, a yoke 11 constituting of a soft magnet material and having said recess for housing said magnetic element, and a disk joined so as to close said opening of said recess with said magnet element housed in said recess. The yoke 11 has an almost disk shape and collars 2 protruding axially outwardly from the outer peripheral surface thereof. The collars 2 are formed to be separated at least two locations in a substantially peripheral direction, and non- protruding portions 3 having radially outward projection amounts of zero or up to 50% of the maximum projection amount at the collars 2 are provided between respective collars 2.
