An embodiment of the present invention provides a direction indicating device for generating a 2D direction indicating signal, which includes a base board, a first rectangular conductive plane formed on the base board, including a first sliding slot, a second rectangular conductive plane formed on the base board, overlapping the first rectangular conductive plane, and including a first sliding slot, a positioning axle perpendicular to the base board, passing through a space corresponding to overlap portions of the first sliding slot and the second sliding slot, for moving the first conductive plane along a first direction, and moving the second conductive plane along a second direction, and a control signal generating module for outputting the 2D direction indicating signal according to electric information of the first conductive plane and the second conductive plane.