An operating device having an optical finger navigation module for installation in a steering wheel of a motor vehicle, which allows for secure operation and can be produced at low cost, is disclosed. The operating device has a mounting frame, in which a first light guiding element and the optical finger navigation module is held by a light sealing element. The light sealing element is mounted by a snap connection on the mounting frame. The mounting frame has at least one guide element with which a movement of the mounting frame can be guided.