A fastening element has a drilling head (21) provided at one end (16) of anchor tube (12) and having at least one inlet opening (23) that opens toward the receiving chamber (13) of the anchor tube (12), and at least one through-opening (24) that opens outwardly for passing of the hardenable mass therethrough, and a mixing element (31) for the hardenable mass and which is located in the drilling head (21) between the at least one inlet opening (23) and the at least one through-opening (24).