A device for the external fixation of a first bone element and a second bone element articulated to each other, comprises: a guide member equipped with a curvilinear guide； a first fastening member slidably associated with the guide and equipped with first means for releasable fastening to the first bone element； a second fastening member associated with the guide member and equipped with first means for releasable fastening to the second bone element； and relative movement means by which the first fastening member is moved relative to the second fastening member along the guide.
