The invention applies to a device for mounting a nasal rest pad on a support member integral with a rim or eyewire of a spectacle frame, comprising a resilient piece that is drawn out in order to be passed in a loop of the arm and in an ear of the pad, and this piece is thereafter released and constricted in the loop and the ear, thus assembling the rest pad to the support arm and the device is applied to a spectacle frame automatically adapted to noses of various shapes.