Abstract: A corrective and protective knee brace wherein the upper and lower portions of the brace are connected together in such a manner that the flexing movement of the brace closely simulates the rolling and sliding movement of the human knee. The simulated knee movement is accomplished in the brace by a novel roller and inclined plane mechanism which coacts with flexible interconnecting cables. The upper portion of the knee brace includes a pair of pressure pads for engagement with opposite sides of the wearer's leg above the knee, and the lower portion of the brace includes a pair of pressure pads for engagement with opposite sides of the wearer's leg below the knee. The brace is provided with a toggle mechanism that is operable after the brace has been positioned on the leg to cause the upper and lower pressure pads to exert inward pressure above and below the knee.