Abstract: A closure device for a container, which possesses a locking means for mutually locking of two container parts when the container is closed. The locking means comprises first and second locking instrumentalities, which are arranged on the different container parts. By means of an actuating member, which is able to be switched over between a closed position and an open position a first engagement member may be shifted between a locking position and a released position. The open position of the actuating member corresponding to the locking position may be secured by an obstructing member in order to prevent unauthorized unlocking of the container. An opening mechanism renders possible an overriding of the obstructing action and a switching over of the actuating member into the open position.