PURPOSE: To control an occurrence of noise when a door, window or the like is closed by providing a damping means to delay the movement of an operating rod from the releasing position to the fixing position under the action of a resilient means in a lock for a door or a French window or the like.

CONSTITUTION: A resilient means 9 made up of a set of coil springs 10 and 11 is provided between the horizontal portion of a connection member 7 connecting operating rods 5 and 6 and the projecting body 13 of a casing 2. A damping means 14 having a double-acting buffer that is operated by circulating a fluid through a squeezing hole or passage 16 is attached to the casing 2 and connected operatively to the rods 5 and 6. When the rods 5 and 6 are moved to the fixing position by the resilient means 9, the rods 5 and 6 drive the moving piston of the damping means 14 through the connection member 7 and reduces noise occurring from the operation of a lock 1 by damping the movement of the rods 5 and 6 by the inertia of a fluid circulating through the squeezing passage 16.