To provide a wind direction display device, such as a streamer or carp streamer, capable of solving such a problem that it is not visually recognizable in the nighttime because it is not illuminated conventionally.

The wind direction display device provided with vent holes at this main body and trails the main body in a direction opposite to a wind direction by the wind force of the air from the vent holes as the air flows in through the vent holes is characterized in that the main body described above is formed of a transparent or translucent member and is provided with illumination means for illuminating the inside thereof.