PURPOSE: To eliminate cleaning, to prevent the wobbling and dropping of a lens, to enjoy various spectacles and to generate the spectacle frame of a good appearance by simplifying lens exchange.

CONSTITUTION: Bridge sliding-type opening/closing locking mechanisms (fixing devices) and opening/closing tools 22 are provided on the right/left of a center bridge. Stoppers are engaged to stopper insertion parts with the operation of the force of an inner pressure tool and they are locked. Then, a sliding part 31 slides. Thus, the opening/closing tools 22 are opened. They are locked by pushing an opening/closing pressure part 23. At the same time, upper/lower rims can be open/close-locked. The appearance faces of the sliding parts 31 and 32 can take any deformed situations for making the effect of an accessory. Thus, the lens is prevented from being easily and erroneously dropped in exchanging the lenses. Farsight glasses, near sight glasses and sunglasses can freely be enjoyed by exchanging the lenses. A space between the lens and the rims can easily be cleaned and screws and the like are not used for an opening/ closing mechanism. Thus, the lens is prevented from wobbling and dropping and the spectacle frame of the good appearance can be used.