A brace for articulation has a first rod, a second rod, and a joint connecting the two rods. The joint has a pair of circular toothed rings provided with a central hole and arranged overlapping. Each circular ring is fixed to one end of the first rod, which is interposed between them, the second rod being interposed between the circular rings. The joint also has a fixing central pivot, inserted in the central holes of the circular rings and into the through hole of said second rod. The joint further has a first and a second blocking member, each provided with a respective pin, adapted to be inserted in two overlapping throats of the indentation of the circular rings, to limit the movement of the second rod.
