An anchoring device for panel supporting structures, which comprises at least one tension element (6) which is adapted to act on a supporting frame (2), which supports at least one panel (3) and rests on a resting surface (4). Means being further provided for tensioning the tension element (6) and means (7) for connecting the tension element (6) to the supporting frame (2) adapted to transmit at least partially the tension forces of the tension element (6) to the supporting frame (2) along a direction that has at least one component substantially perpendicular to the resting surface (4).