PURPOSE: To know the azimuth of an antenna easily by providing a scale to a rotatable part where the antenna and a strut are connected together.

CONSTITUTION: The elevation of the antenna is varied along the slit of a frame part 17 provided to a reflector. The elevation of the antenna is known by reading the scale 16 indicated by a supporting mechanism 14. Further, the reflector is connected to a strut 18. The supporting mechanism 14 is fixed to the strut 18 at a fixation part 21. The fixation part 21 is provided with a spiral slit 26. The slit 26 has the scale. This scale corresponds to the azimuths of the antenna. The suppoting mechanism 14 and supporting mechanism 13 are rotated to set its azimuth and elevation. The angles are made known easily by reading scales provided to slits 26 and 26, so the antenna is set in an accurate direction in a short time.