An orthopedic apparatus intended for moving a leg and a hip area relative to each other, comprising a backing plate which is intended for supporting the hip area and under which is coupled a first end of an elongated support rail adapted to carry a leg propping portion, and said support rail having its second, free end provided with a single handle for an adjustment mechanism intended for clamping and releasing motions of the support rail, and a leg propping portion which is mountable onto the support rail in a slidable manner, and the apparatus includes a first adjustment mechanism and a second adjustment mechanism, which is provided with a universal joint and the second adjustment mechanism, defines together with the first adjustment mechanism, horizontal and vertical motion paths for the support rail with respect to the backing plate, characterized in that the first adjustment mechanism, comprises a pair of gas springs located between the support rail's first end and brackets attached to the backing plate, under the backing plate, wherein each gas spring (41, 42) has its piston rod ends (41c, 42c) extending to a center shaft, which is co-directional with a plane of the backing plate and which extends through the universal joint's lower joint member in a rotatable manner, and the second ends extend to brackets, under the backing plate, to a distance from attachment points of the piston rod ends (41c, 42c) of the gas spring (41, 42) on the center shaft and which first adjustment mechanism, is used for adjusting the clamping of motion paths of the support rail and the force required for pivoting the support rail, wherein said pair of gas springs - has its piston rod ends (41c, 42c) capable of being coupled releasably to the gas spring's fastener mounted on the center shaft and the pair of gas springs has its second ends coupled to the brackets attached under the backing plate, such that the gas springs (41, 42) are substantially co-directional with the backing plate as well as, at least with the apparatus in a state of rest, also substantially co-directional with the support rail, - has each of its gas springs (41, 42) adapted to be acted upon by a clamping mechanism of the first adjustment mechanism, by means of which the position of the piston rod (41a, 42a) of the gas spring (41, 42) is capable of being released and clamped with respect to a cylinder (41b, 42b) of the respective gas spring and the clamping mechanism comprises said single handle, which is present at a free end of the support rail and which is adapted to act, through the intermediary of a lever arm system, upon the gas spring's piston rod end (41c, 42c) in such a way that the position of the gas spring's piston rod (41a, 42a) with respect to the respective cylinder (41b, 42b) and the lever arm system is capable of being released and clamped, the second adjustment mechanism couples the first end of the support rail pivotably under the backing plate or to the brackets attached under the backing plate. - has its piston rod ends (41c, 42c) capable of being coupled releasably to the gas spring's fastener mounted on the center shaft and the pair of gas springs has its second ends coupled to the brackets attached under the backing plate, such that the gas springs (41, 42) are substantially co-directional with the backing plate as well as, at least with the apparatus in a state of rest, also substantially co-directional with the support rail, - has each of its gas springs (41, 42) adapted to be acted upon by a clamping mechanism of the first adjustment mechanism, by means of which the position of the piston rod (41a, 42a) of the gas spring (41, 42) is capable of being released and clamped with respect to a cylinder (41b, 42b) of the respective gas spring and the clamping mechanism comprises said single handle, which is present at a free end of the support rail and which is adapted to act, through the intermediary of a lever arm system, upon the gas spring's piston rod end (41c, 42c) in such a way that the position of the gas spring's piston rod (41a, 42a) with respect to the respective cylinder (41b, 42b) and the lever arm system is capable of being released and clamped, the second adjustment mechanism couples the first end of the support rail pivotably under the backing plate or to the brackets attached under the backing plate.