Abstract: PCT No. PCT/DE78/00020 Sec. 371 Date May 4, 1979 Sec. 102(e) Date May 4, 1979 PCT Filed Aug. 14, 1978 PCT Pub. No. WO79/00134 PCT Pub. Date Mar. 22, 1979Mixer valve for sanitary engineering with a slide plate, adjustable by means of a handle, to regulate the mixture ratio and outflow volume of tap water.For the precise and comfortable setting of the mixed water temperature in the preferred setting range, particularly between 30.degree. and 45.degree. C., and for the simple, space-saving and cost-favorable manufacture of the device, it is proposed to arrange the slide-plate parallel to the center axis in the valve housing and mount it in a movable and slewable manner around a rotational axis displaceable parallel to the center axis, whereby the slide plate is guided by a head piece displaced in relation to the center axis and protruding from the valve housing on a lever mounted to allow upwards and downwards movement in the jacket of a head housing mounted rotatably around the center axis.