Abstract: Closing and opening device for drawer pull-out guides (10) with a guide rail (12) to be fixed on a carcass wall of a piece of furniture and a running rail (14) which is mounted so as to be displaceable relative to the guide rail—optionally with a central rail (11) interposed—and is to be fixed on the drawer. On a latch housing (22) disposed on one of the two aforementioned outer rails there is provided a movable catch component (24) which is pretensioned by a spring arrangement in a bistable manner into two end positions spaced from one another in the direction of movement of the drawer, and the catch component has a seat (36) for a dog (26) which is provided on the other rail and which moves into the seat during the relative displacement of the rails as the closed position is approached and pivots the pretensioned movable catch component (24) and thereby unlocks it from the associated end position.