Abstract: The invention relates to a control device for controlling the flow of a fluid through a thermostatic faucet comprising a temperature control device (5) within the body of the faucet for controlling the outlet temperature of the fluid and comprising a thermosensitive element (3) and a flow control device (11) for controlling the flow from the faucet. The temperature control device includes a control knob (12) and the flow control device includes a control element (13). This control device is characterized in that the flow control device (11) is disposed downstream from the mixing chamber and controls the flow cross section of an outlet located downstream from the mixing chamber, and the control knob and control element are located on the same side of the body of the faucet that houses the control device, and on the opposite side from the outlet.