Abstract: An aligning device and a fixing clamp for an aligning device for fixing and clamping a body extremity. The fixing clamp includes a first clamp arm, a second clamp arm, and a support fork or trough. The support fork or trough includes first and second support legs. The clamp also includes a section for mounting on or connecting to an adjusting rod, and first and second articulation joints on the support fork. The first clamp arm is rotatably articulated at one of the articulation joints about a first rotational axis, and the second clamp arm is rotatably articulated at the other of the articulation joints about a second rotational axis. The first articulation joint is displaceably mounted on the first support leg, and/or the second articulation joint is displaceably mounted on the second support leg of the support fork or trough.