Mixing and shut-off valve device, preferably sanitary mixing and shut-off valve device, comprising - a valve housing body, - a valve unit in the valve housing body having a shut-off controller for controlling a fluid flow rate, and a mixing controller for controlling a fluid mixing ratio, - a shut-off operation device coupled to the shut-off controller as a user interface for actuating the shut-off controller of the valve unit and movable relative to the valve housing body between a shut-off position and an open position, - a mixing operation device coupled to the mixing controller as a user interface for actuating the mixing controller of the valve unit and rotatably movable relative to the valve housing body about a mixing rotational axis between a first mixing end position and a second mixing end position, and - a snap device coupling the mixing operation device to the valve housing body in a snap movable manner and comprising a snap means on the mixing operation device and a mating snap means on the valve housing body corresponding to the snap means, - wherein the snap means and the mating snap means comprise a snap cam unit on the one hand and a snap sprocket gear on the other hand, and - wherein the shut-off operation device is translationally movable along a shut-off actuating direction parallel to the mixing rotational axis, characterized in that - a self-resetting device of the mixing and shut-off valve device provides a reset force for self-acting reset of the mixing operation device to the first mixing end position, - a snap force provided by the snap device for the mixing operation device in the open position of the shut-off operation device is greater than and in the shut-off position of the shut-off operation device is smaller than the reset force provided by the self-resetting device for the mixing operation device, and - the snap cam unit comprises at least one snap cam which is disposed on a free end of a radially elastically resilient snap arm extending in parallel to the mixing rotational axis on the mixing operation device, and/or the self-resetting device includes a helical spring element supported on the valve housing body and exerting a reset torque on the mixing operation device, where the spring element is disposed on the valve housing body with its longitudinal axis extending along an arch perpendicular to the mixing rotational axis. - a valve housing body, - a valve unit in the valve housing body having a shut-off controller for controlling a fluid flow rate, and a mixing controller for controlling a fluid mixing ratio, - a shut-off operation device coupled to the shut-off controller as a user interface for actuating the shut-off controller of the valve unit and movable relative to the valve housing body between a shut-off position and an open position, - a mixing operation device coupled to the mixing controller as a user interface for actuating the mixing controller of the valve unit and rotatably movable relative to the valve housing body about a mixing rotational axis between a first mixing end position and a second mixing end position, and - a snap device coupling the mixing operation device to the valve housing body in a snap movable manner and comprising a snap means on the mixing operation device and a mating snap means on the valve housing body corresponding to the snap means, - wherein the snap means and the mating snap means comprise a snap cam unit on the one hand and a snap sprocket gear on the other hand, and - wherein the shut-off operation device is translationally movable along a shut-off actuating direction parallel to the mixing rotational axis, characterized in that - wherein the snap means and the mating snap means comprise a snap cam unit on the one hand and a snap sprocket gear on the other hand, and - wherein the shut-off operation device is translationally movable along a shut-off actuating direction parallel to the mixing rotational axis, characterized in that - a self-resetting device of the mixing and shut-off valve device provides a reset force for self-acting reset of the mixing operation device to the first mixing end position, - a snap force provided by the snap device for the mixing operation device in the open position of the shut-off operation device is greater than and in the shut-off position of the shut-off operation device is smaller than the reset force provided by the self-resetting device for the mixing operation device, and - the snap cam unit comprises at least one snap cam which is disposed on a free end of a radially elastically resilient snap arm extending in parallel to the mixing rotational axis on the mixing operation device, and/or the self-resetting device includes a helical spring element supported on the valve housing body and exerting a reset torque on the mixing operation device, where the spring element is disposed on the valve housing body with its longitudinal axis extending along an arch perpendicular to the mixing rotational axis.