To provide a lens mounting structure for rimless spectacles which does not limit the field of vision when a user wears the spectacles, can more securely hold and fix lenses, is excellent in safety and does not substantially hinder cleaning of lens faces.

A connecting member 20 for connecting the lens 2 to an endpiece and/or bridge is arranged on the front surface side of the lens 12. The connecting member 20 has a first connecting hole 26 communicating with a first lens hole 14 and a second connecting hole 28 communicating with a second lens hole 16. A fast fastening member 30 is inserted across the first lens hole 12 to the first connecting hole 26 from the rear surface side of the lens 12. Similarly, a second fast fastening member 36 is inserted across the second lens hole 28 to the second connecting hole 28. The first fastening member 30 and the second fastening member 36 respectively have shaft diameters greater than the hole diameters of the first connecting hole 26 and the second lens hole 28.