Abstract: An expansion anchor (3) is provided for retention in an approximately cylindrical well hole (7) having a conical enlargement (9) at a distance from the well opening and widening toward the well hole floor. The expansion anchor (3) is provided on its sleeve or ring-shaped latch supporting member (21) with at least two latches (31) flaring downhole and adapted to be deflected into the enlargement (9). Screwed onto a threaded spindle (11) extending through the latch supporting member (21) is an expansion cone (23) tapering up to the well opening, by means of which the latches (31) are urged into surface engagement with the conical enlargement (9) in the wall of the well hole. The expansion cone (23) is provided with an abutment (33) facing uphole, and the latch supporting member or the latches are provided with an oppositely facing abutment (32) extending into the withdrawal path of the expansion cone (23).