An attachment for removably supporting a denture in the mouth of the user in which the user has at least two spaced apart dental posts implanted therein, the attachment including a first basic portion in the form of an anchor member semi-permanently attached to the anchor post and being curved to generally the shape of the alveolar ridge of the user and having a bar portion extending between the spaced apart dental posts, the anchor member having retention means at the ends thereof such as in the form of a recess at each end. The attachment second basic portion is a denture member which conforms generally to the contour of the anchor member and which is engageable in proximity with the anchor member. The denture member is cast within a denture having simulated gum portions and teeth portions. The denture member has retention means such as integrally formed posts which are removably insertable into the recess in the anchor member, the axis of the posts and the axis of the recesses being inclined toward planes of the anchor member and the denture member. The denture member includes an arm pivotal between a locked and an unlocked position. The arm has a blade portion which engages the anchor member at a point intermediate the retention means so that the arm when in the locked position retains the denture within the mouth of the user, the arm being engageable at its outer end by the fingernail of the user so that it can be pivoted to the unlocked position, allowing the denture to be removed.