A leg brace usable after knee ligament surgery utilizing first and second members which are held to the femoral and tibial portions of the leg. A hinge mechanism is also included in the brace for permitting pivotal rotation between the first and second members with the bending or flexion of the knee. A bar is extended across a selected portion of the leg. The bar is biased against the leg by a spring to prevent translation between the tibia and femoral for a particular angular range of extension of the knee portion of the leg.