Orthopaedic device (10, 110, 210, 310) for correcting deformitiesof a long bone (11)3 comprising a bar (12), extended along anaxis (Y-Y) and intended to be placed alongside the bone (11), at least afirst clamp (14, 214, 314) for a first group of osseous screws (16) and asecond clamp (18, 19, 118) for a second group of osseous screws (20, 22),removably mounted on said bar (12), wherein the first of said clamps (14,214, 314) is placed onboard a support base (21, 221, 321) in turn mountedon said bar (12), and angularly movable in relation to the support basearound a given rotation axis (X-X5 XJ-XJ, Z-Z) by means of a rotary coupling,characterised in that said rotary coupling comprises a male element(35； 235, 236, 237, 238, 239； 333, 334) associated with the first clamp (14,214, 314) and having a surface at least partially cylindrical, and acorrespondingfemale element (36； 130； 250, 254, 255； 336, 337) associatedwith the support base (21, 221, 321) and having a surface at least partiallycylindrical constituting a seat for the loose coupling of the male element(35； 235, 236, 237, 238, 239； 333, 334).
