PURPOSE: To realize the use of spectacles under a gas mask or an underwater glass as well as for sports, by connecting a front plate to a front frame via a front support arm and using an elastic band to fix the spectacles to the head.

CONSTITUTION: A side plate 2 is connected across a front plate 1 via hinge 3. With use of the plate 2, the spectacle structure can be fixed at the half of the user's head. Both ends of the plate 2 are connected to each other by means of an elastic matter, e.g., a rubber band 4. The upper part of each front frame 6 that holds a lens and the plate 1 are fixed with a front support arm 5. In such a structure, the slant angle θ of the frame 6 is controlled by bending the arm 5.