[Problem] To provide a knee brace capable of correction only in the angle region necessary and of reproducing healthy screw-home movement in the knee joints of patients with osteoarthritis of the knee. [Solution] The outer and inner leg joints (30, 50) are provided with first and second connecting means (31, 35, 51, 55) that are connected at junctions, which are at the sides of the knee joint. The junctions are provided with: a cam groove (34, 54) in either the first or the second connecting means a long groove (37, 57) in either the second or the first connecting means a rotational axis (42, 59) in either the first or the second connecting means that slides in the long groove and a cam axis (39, 62) in either the second or the first connecting means that slides in the cam groove. During knee flexion, the rotational axes and cam axes slide in the long grooves and cam grooves, the second connecting means rotate with respect to the first connecting means with the junction as the center, and the outer and inner leg joints bend. During extension of the outer and inner leg joints, the rotational axes and cam axes slide in the long grooves and cam grooves, and the second connecting means on the outer leg side moves up and rearward, and the second connecting means on the inner leg side moves down and forward.[Problème] Produire une attelle de genou capable de réaliser une correction uniquement dans la région angulaire nécessaire et de reproduire un mouvement de rotation interne automatique normal dans les articulations des genoux de patients ayant de larthrose du genou. [Solution] Les articulations des jambes extérieures et intérieures (30, 50) sont pourvues de premiers et deuxièmes moyens de raccordement (31, 35, 51, 55) qui sont raccordés à des jonctions, qui sont sur les côtés de larticulation du genou. Les jonctions sont pourvues de : un chemin de came (34, 54) dans les premiers ou les deuxièmes moyens de raccordement un chemin long (37, 57) dans les deuxièmes ou les
