Abstract: A heliostat apparatus including: a frame supporting a solar battery panel; a north-south rotation mechanism having an elevation angle rotation axis for rotating the frame in a north-south direction; an east-west rotation mechanism having an azimuth angle rotation axis for rotating the frame in an east-west direction; and a support, where an angle in the north-south direction of a panel surface of the solar battery panel is adjusted by the north-south rotation mechanism; an angle in the east-west direction of the panel surface is adjusted by the east-west rotation mechanism; the elevation angle rotation axis and the azimuth angle rotation axis are in a skew positional relationship; and the frame is held by a truss structure of each of the north-south rotation mechanism and the east-west rotation mechanism. A type of heliostat apparatus that follows the movement of the sun and can hold a solar battery panel stably.