Abstract: The present invention provides a hinge for an orthopaedic knee brace comprising first and second hinge members rotatably connected together. The first hinge part is provided with an annular slot for receiving a pin provided on the second hinge member. First and second stop members are provided with opposed stop faces located in the region of the annular slot and are manually positionable circumferentially along the annular slot whereby to define a limited range of relative movement between the hinge members and a clamping member is provided for applying a clamping force to the stop members in a direction parallel to the axis of rotation of the hinge members, the stop members and the first hinge member having inter-engaging projections and recesses whereby to clamp the stop members to the first hinge member.