The invention relates to a flow regulator (1) having a flow regulator housing, with a rotor disk (9) being supported in a rotary fashion in the interior space of its housing, which is embodied at least in a partial section of the disk in a liquid-permeable fashion and (9) is in a driven connection with a rotor disk drive, which transfers the flow of the water flowing through the flow regulator housing into a rotary drive force used for a rotary motion of the rotor disk (9). Using the flow regulator according to the invention considerable water savings can be achieved without here any reduction of the volume flow being clearly discernible.