To stop a door in an optional position by rotating a lever handle arranged on the door, and bringing a stopper into pressure contact with a floor surface by rotatably delivering the stopper provided in a lower part of the door.

An opening-closing operation stopping mechanism is constituted in such way that a lever handle of a lever handle lock is rotated in one direction, and a stopper body 50 provided in a lower part of a door D is rotatably delivered toward a floor C surface, and is brought into pressure contact with a floor C, and a pressure contact condition is released by reversely rotating the lever handle, and the stopper 50 is transferred into the door D. In this case, a rotary shaft of the lever handle is fixed to a rotary shaft 11, and a belt 81 having teeth is installed through guide rollers 21a and 21b on a gear 20 fixed to the shaft 11 and a gear 61 fixed to the stopper 50 coaxially with its rotary axis. The stopper 50 composed of rubber or the like on which a part of a circular arc is chipped, is made eccentric to the circular arc side opposite to a flat surface 50b, and a rotary shaft hole 52 is provided. Therefore, the door can be stopped in a desired release position, and can be easily operated, and a locking means of a floor surface of the like can also be obviated.