A device (1) for mutually fixing a longitudinal carrier (3) to a bone fixation element (4), wherein the device consists of a three-dimensional body (5) which has a channel (6) that is open on one side, wherein the axis of the channel (7) receives the longitudinal carrier (3), and a bore hole (8) that extends crosswise in relation to the axis of the channel (7) through the body (5) and that is provided with a wall (10). At least one part of the bore wall (10) disposed between the channel (6) and the bore hole (8) is embodied as an elastic element (11) which can be pressed into the region of the channel (6) by introducing the bone fixation element (4) into the bore hole (8), such that a longitudinal carrier (3) arranged in the channel can be firmly clamped in a rotational and longitudinal manner by said elastic element (11).