Fixing clamp (10), more particularly, to be used in an external fixation system to hold fragments of bones adjacent to each other with the help of fixing elements, comprising at least two sets (20, 30) of clamp that they have at least one receiving element (71, 72, 73) to accommodate a fixing element along the longitudinal axis of the receiving element (71, 72, 73) and, at least, a blocking element (40) that is extends through the clamp assemblies (20, 30) to block the position of the clamp assemblies (20, 30) in a defined angular position, in which between said locking element (40) and at least said single clamp assembly (20) is arranged a washer (41), in which, as seen, observing along the locking element, a first clamp assembly (20) is followed, at least, by a second set (30) of clamp, in which the locking element (40) is in contact with the second do clamp assembly (30) by means of a thread (49), and in which the locking element (40) extends through the first clamp assembly (20), in which a spring (15) provides a axial force on the first caliper assembly (20), which is pushed against said washer (41), characterized in that said caliper assembly (20, 30) comprises a first contact surface (80) that is spherical and convex and because said washer (41) comprises a second contact surface (81) which is spherical and concave, in which the first contact surface (80) is in contact with the second contact surface (81), and because said washer comprises a cut (87) extending radially to the central axis (MI) of a through opening (84) through a side wall (85), such that said washer can be mounted and removed in a substantially radial direction towards the central axis (MI) of the blocking element (40).Pinza de fijación (10), más particularmente, para ser utilizada en un sistema de fijación externo para sostener fragmentos de huesos adyacentes entre sí con la ayuda de elementos de fijación, que comprende por lo menos dos conjuntos (20, 30) de pinza que tienen al menos un elem
