Abstract: A knee orthodic is provided with two load-bearing joints (12, 14), each joint having a proximal leg (16.1, 16.2) and a distal leg (18.1, 18.2). The knee orthodic, may be adapted more easily to a changing knee width. This is achieved in that the proximal legs (16.1, 16.2) are connected by a proximal joint (24) and the distal joints (18.1, 18.2) are connected by a distal joint, said proximal legs (16.1, 16.2) being connected pivotally and fixably relative to one another in the proximal joint (24) in the form of a rotary joint about a proximal joint pivot axis (P).