Abstract: A self-acting locking bolt for doors or the like, more particularly furniture doors, comprising at least one receiving part on one door leaf or frame, and at least one locking part on the other door leaf or on a door leaf, the locking part having a control connecting-link for a pin of a bolt guided so as to be movable vertically in the locking part, the said pin projecting sideways out of the locking part, in that the locking part is substantially flush with the top edge or bottom edge of the door leaf, in that the bolt does not project, or projects only slightly, beyond the top edge of the locking part when the door leaf is in an open position and projects beyond the top edge into a matching location in an associated frame part when the door leaf is in a closed position, and in that the receiving part has a recess with which the pin of the bolt may be brought into engagement in the locking operation and is pushed along the connecting-link guide and in wich the pin is located when the door leaf is closed.