An operating device for a gear-changing transmission operated by shift-by-wire is disclosed. The operating device includes an operating element, rotatably or pivotally supported in a bearing position having a position sensor device, and a device for producing force-feedback. The force-feedback device includes an adjustable counterforce element acting on the operating element, wherein the counterforce element comprises a fluid having controllably variable viscosity. The operating device including the counterforce element is produced by a bearing gap of the bearing position of the operating element, with the bearing gap being filled with the fluid. A space-saving integration of the counterforce element of a force-feedback device is enabled into the joint of an operating lever. Thus, the cost, structural complexity, and installation space required for an operating device having force-feedback is significantly reduced. The haptics of a mechanical operating lever can be realistically emulated.