A thermostatic mixing valve for mixing cold water and hot water and for setting a mixed water temperature, having an electric motor that is controllable by a control unit and acts via a gear stage on a valve body, which is stroke-adjustable over a setting range and with which the mixing ratio between hot and cold water can be varied depending on a target mixed water temperature, presettable on the user side, and having a sensor element for detecting at least one set position in the setting range of the thermostatic mixing valve. The gear stage has a linearly adjustable linear displacement element, arranged rotationally fixed and provided between the electric motor and the valve body, and the sensor element works together with the linear displacement element to detect the set position.