Abstract: An anchoring element (6) for anchoring a ground anchor (1) to a structural part (2) to be supported, for the purpose of enabling the intactness of a closed protective tube (4), which encloses strands (3) of the ground anchor (1) in the borehole and protects the said strands from corrosion, to be checked by applying a voltage between the strands (3) and earth and measuring the resultant current, even after the uppermost section of the ground anchor (1) has been grouted with a cement compound in a guide-through duct (13) in the anchoring element (6) and the latter has likewise been grouted in an anchor conduit (14), is made from electrically insulating material, preferably polyamide, at least to the extent that no electrically conductive connection exists between the strands (3) and the cement compound in the guide-through duct (13), on the one hand, and between the cement compound outside the said guide-through duct and the structural part (2), on the other hand.