Abstract: The invention is a device (1) for fixing an antenna to a supporting surface (S), comprising a base plate (2) arranged against the supporting surface (S) and a fixing element (3) that communicates with an underlying opening (5) made in the supporting surface (S). In this fixing device the fixing element (3) is provided with a first and a second set of projecting elastic tabs (8, 9) suited to lock the base plate (2) to the supporting surface (S), through the thrusting action of the first set of elastic tabs (8) against the wall (10) of the supporting surface (S) and the insertion of the second set of elastic tabs (9) in a plurality of recesses (12) present on the edge of the opening (5) when the first and second set of elastic tabs (8, 9) are positioned in the opening (5) through the insertion and the successive shifting of the base plate (2) with respect to the supporting surface (S).