An orthopaedic device for supporting and guiding an articulation comprises a three-dimensional tubular element (12) with non-constant section and at least one band (13) for fastening the tubular element (12), as well as sliding guides (14) of the at least one fastening band (13) and a double return buckle (15) for symmetrically tightening free opposite ends (16) of the fastening band (13), in which the free opposite ends (16) of the fastening band (13) can each be inserted in a slot (17) of the double return buckle (15) and able to be fixedly connected onto itself through removable fastening means (25).
