To prevent piece of cloth from being caught by nut elements at the time of cleaning lenses with this piece of cloth with a lens mounting structure for fixing the lenses to either or both of the wraparound endpieces or bridge of rimless spectacles by using external screw elements and the nut elements.

Either or both of the wraparound endpiece 10 and the bridge are provided with the external screw element 12 projecting from a prescribed point. The prescribed point of the lens is provided with an insertion hole 16 for insertion of the external screw. A recessed part 18 for housing the nut element to be screwed to the external screw element is formed relative to the insertion hole on the second lens face F2 on the side opposite to the first lens face F1 at which either one or both of the wraparound endpiece and the bridge are applied to the lens L.