The present invention relates to a clamp crow (10) for attachment to a slide rail (100) of an operating table, the slide rail (100) having a rectangular cross section. The clamp crow (10) has a main part (12) having at least one support surface (37 and 38) designed to be supported by the slide rail (100), and is attached to the main part (12). A shaft (20) rotatably mounted about one rotation axis (X) and a clamp structure (14) having at least one support element (19). Furthermore, the clamp crow (10) has an operating element (22) which is rotatably fixed to the shaft (20) and can be moved from the starting position (83) to the fixed position (23) by a turning motion. In the fixed position, the clamping structure (14) is in a locked state in which the main support surfaces (37 and 38) and the supporting element (19) of the clamping structure (14) are anchored to the slide rail (100). The Furthermore, the shaft (20) has eccentrics (56 and 72) that can pivot about the first rotation axis (X). The support element (19) is stationary with respect to the eccentrics (56 and 72), and is mounted so as to be rotatable about a second rotation axis (Y) parallel to the first rotation axis (X). The support element (19) is moved from the initial position (81) to the support position (77) during the pivoting movement of the operating element (22) so that the clamping structure (14) is in the locked state at the support position (77). ) To the slide rail (100). Furthermore, if the pivoting movement of the support element (19) is hindered at an intermediate position between the initial position (81) of the support element (19) and the support position (77), the start position (83) and the fixed position ( A locking arrangement (27) is provided which prevents the pivoting movement of the operating element (22) in an intermediate position between 23). [Selection] Figure 1本発明は、手術台のスライドレール（１００）に取り付けるためのクランプクロウ（１０）に関し、スライドレール（１００）は、矩形断面を有する。クランプクロウ（１０）は、スライドレール（１００）に支持される様に設計された少なくとも１つの支持
