To provide a laser course display device possible to be accurately followed with the simple structure and provided with a safety function for stopping the radiation of the laser beam when a vessel enters between a light emitting buoy and a target buoy.

A resident buoy 6 is provided with a laser course display device 2 for radiating the laser beam as the light emitting buoy 1, and anchored to the sea bottom through a universal joint 8. A resident buoy 7 is provided with a laser reception part 4 for receiving the laser beam 5 as a target buoy 3, and fixed to the sea bottom through a universal joint 9.