Sealing plug (10a-10d, 10f) for sealing anchor holes, in particular conical anchor holes, in concrete walls, comprising a rod element (12a-12e) that has at least one rod portion (14a-14d) that engages with a locking element (18a-18e), the sealing plug (10a-10d, 10f) comprising a first flexible element (24a-24e) that can be pressed in the longitudinal direction or in parallel with the longitudinal direction of the rod element (12a-12e) along the longitudinal axis of the rod element (12a-12e) and/or the locking element (18a-18e) due to a movement of the rod element (12a-12e) relative to the locking element (18a-18e), the first flexible element (24a-24e) being movable along the longitudinal axis of the rod element (12a-12e) without rotation and the first flexible element (24a-24e) indirectly or directly abutting the rod element (12a-12e) and/or the locking element (18a-18e), characterized in that a) the sealing plug comprises at least one second flexible element that is separated from the first flexible element by a first separating element, the first separating element being non-rotatable with respect to the longitudinal axis of the rod element, the rod element being planar at least in portions on at least one side (46, 48) in the longitudinal direction of the rod element, the first separating element comprising a through-passage, the cross section of which is adapted, by means of a clearance fit or an interference fit, to the cross section of the rod element perpendicularly to the longitudinal direction thereof in the region in which the rod element is planar at least in portions, and/or b) the rod element (12a-12d) is designed as a threaded element that comprises at least one first threaded rod portion (14a-14c) having a first thread (16a-16c) that engages with a second thread (44a-44c) of the locking element (18a-18d) and the sealing plug (10a-10d) comprises a first rotary element (20a-20d) that is rotatable about the longitudinal axis of the threaded element and/or the locking element (18a-18d) relative to the threaded element (12a-12d) and/or the locking element (18a-18d) and indirectly or directly abuts the threaded element and the first flexible element (24a-24d), the rod element comprising a second threaded rod portion having a third thread that engages with a fourth thread of the first rotary element, the first and the second threads (16c, 44c) being opposite-handed with respect to the third and fourth threads (76, 78). a) the sealing plug comprises at least one second flexible element that is separated from the first flexible element by a first separating element, the first separating element being non-rotatable with respect to the longitudinal axis of the rod element, the rod element being planar at least in portions on at least one side (46, 48) in the longitudinal direction of the rod element, the first separating element comprising a through-passage, the cross section of which is adapted, by means of a clearance fit or an interference fit, to the cross section of the rod element perpendicularly to the longitudinal direction thereof in the region in which the rod element is planar at least in portions, and/or b) the rod element (12a-12d) is designed as a threaded element that comprises at least one first threaded rod portion (14a-14c) having a first thread (16a-16c) that engages with a second thread (44a-44c) of the locking element (18a-18d) and the sealing plug (10a-10d) comprises a first rotary element (20a-20d) that is rotatable about the longitudinal axis of the threaded element and/or the locking element (18a-18d) relative to the threaded element (12a-12d) and/or the locking element (18a-18d) and indirectly or directly abuts the threaded element and the first flexible element (24a-24d), the rod element comprising a second threaded rod portion having a third thread that engages with a fourth thread of the first rotary element, the first and the second threads (16c, 44c) being opposite-handed with respect to the third and fourth threads (76, 78).