PURPOSE:To permit a plurality of times of lighting by one piece of light and facilitate seeing from a direction, in which the towed body could hardly be seen as a target body so far, simply by changing the generating method of the light from explosive into a lighting device. CONSTITUTION:A commanding signal, outputted from an aeroplane 1 or a control device 2 on the ground, is received by the antenna 5 of a towed body 3a and a receiver 6 outputs a control signal based on the received signal while the control signal is supplied to a controller 7. The controller 7 controls the connecting and/or interrupting of the connection between a battery 8 and a light 9 based on the control signal to light or extinguish the light 9. Light beams, emitted from the light 9, premeate through a cover 10 and are released into space, in which the body is being towed. The towed body 3a can be utilized as a target body, providing a guiding flying body with guiding light emitted from the light 9, in such a manner.