A blocking and interlocking unit • intended for displaceable and pivotable doors and/or walls, which are guided in a mobile manner via running rollers at and/or in a running rail, and • including - an upper component, which is configured to be attachable to the running rail - a central component, which is configured to be attachable to a mobile carriage profile of a respective one of the doors, respectively the walls, and - a lower component, which is configured to be attachable to the respective door, respectively the wall, characterized in that • the blocking and interlocking unit is adapted, by means of adjusting one and the same arresting means of the blocking and interlocking unit, - in a first setting, to arrest the central component at the upper component, however not at the lower component, - in a second setting, to arrest the central component at the upper component and at the lower component, and - in a third setting, to arrest the central component at the lower component, however not at the upper component, • the arresting means are configured by means of a rotatably supported locking element, which is rotatably supported at the central component about an axis of rotation, • the adjustment of the arresting means is realized by means of turning the locking element, • an adjusting mechanism is intended for turning the locking element between respective positions, which correspond to the first, the second and the third settings, and • the locking element - in the first position engages in or at the upper component such that the blocking and interlocking unit is located in the first setting, - in the second position engages in or at the upper component and in or at the lower component such that the blocking and interlocking unit is located in the second setting, and - in the third position engages in or at the lower component such that the blocking and interlocking unit is located in the third setting, and - the locking element includes a form having the shape of a segment of a circle or a form having almost the shape of a segment of a circle. • intended for displaceable and pivotable doors and/or walls, which are guided in a mobile manner via running rollers at and/or in a running rail, and • including - an upper component, which is configured to be attachable to the running rail - a central component, which is configured to be attachable to a mobile carriage profile of a respective one of the doors, respectively the walls, and - a lower component, which is configured to be attachable to the respective door, respectively the wall, characterized in that - an upper component, which is configured to be attachable to the running rail - a central component, which is configured to be attachable to a mobile carriage profile of a respective one of the doors, respectively the walls, and - a lower component, which is configured to be attachable to the respective door, respectively the wall, • the blocking and interlocking unit is adapted, by means of adjusting one and the same arresting means of the blocking and interlocking unit, - in a first setting, to arrest the central component at the upper component, however not at the lower component, - in a second setting, to arrest the central component at the upper component and at the lower component, and - in a third setting, to arrest the central component at the lower component, however not at the upper component, - in a first setting, to arrest the central component at the upper component, however not at the lower component, - in a second setting, to arrest the central component at the upper component and at the lower component, and - in a third setting, to arrest the central component at the lower component, however not at the upper component, • the arresting means are configured by means of a rotatably supported locking element, which is rotatably supported at the central component about an axis of rotation, • the adjustment of the arresting means is realized by means of turning the locking element, • an adjusting mechanism is intended for turning the locking element between respective positions, which correspond to the first, the second and the third settings, and • the locking element - in the first position engages in or at the upper component such that the blocking and interlocking unit is located in the first setting, - in the second position engages in or at the upper component and in or at the lower component such that the blocking and interlocking unit is located in the second setting, and - in the third position engages in or at the lower component such that the blocking and interlocking unit is located in the third setting, and - the locking element includes a form having the shape of a segment of a circle or a form having almost the shape of a segment of a circle. - in the first position engages in or at the upper component such that the blocking and interlocking unit is located in the first setting, - in the second position engages in or at the upper component and in or at the lower component such that the blocking and interlocking unit is located in the second setting, and - in the third position engages in or at the lower component such that the blocking and interlocking unit is located in the third setting, and - the locking element includes a form having the shape of a segment of a circle or a form having almost the shape of a segment of a circle.