Disclosed herein is a flickering device for an automobile wheel. The flickering device flickers using electromotive force, generated by the interaction between magnetic force and a coil unit as a rotating body rotates, as an electric power source. The flickering device has a circuit board. The circuit board includes a sensor for detecting power generated by rotation of a rotating shaft and a speed of an automobile; a timer adapted to receive signals from the sensor, count predetermined time and operate; a cadmium sulfide element for detecting brightness of light and supplying current; a control unit for controlling components; and LEDs adapted to be operated under the control of the control unit.