Abstract: A modular distributing valve includes a valve body within which an actuating member is displaceably arranged along a longitudinal axis of the valve body. A pair of control housings lying opposite each other on the axis for actuating the actuating member are arranged in the valve body. The valve body is a tub-shaped base body which can be closed by a flat cover and is provided with ISO gas connection openings on the side opposite the cover. In order to achieve ease of assembly and eliminate the need for sealing elements around the actuating member and the switched fluid paths in the modular distributing valve, the control housings are detachably connected to the cover and are inserted with a mechanical interference fit forming a seal and fixed in place in the valve body, together with the actuating member, from the side of the valve body opposite the gas connections.