PURPOSE: To prevent damages to a prop or the surfaces facing each other when strong vibration or outer power is added thereto, and to surely prevent furniture from falling especially when the prop is used as a furniture stopper.

CONSTITUTION: The end part 33 of this prop has a recess 35, and an adjuster 15 at the outer edge of a support pole 4 is loosely inserted into the recess 35. The adjuster 15 is movable inside the recess 35 and the support pole 4 can be swayed against the end part 33.