To sufficiently cope with an earthquake of an extremely strong seismic intensity without spoiling beauty of a room.

A fixed body 1 is long and has a specified width, and arranged fixedly in horizontal direction in a position of a splint which contacts a floor F of the lower side of a wall W. The lower ends of straps 2 are hooked to a coupling material, which is fitted to the fixed body so as to slide freely. The upper ends of the straps are clamped to lock tightly by eccentric clamps 3, which are fixed on the upper surface of furniture A.