FIELD : medicine.SUBSTANCE : invention relates to medicine. Device simulator for active supination with flat feet contains a base, two supports for the feet and compression springs. Each of the foot supports is attached to the base by edges designed to position the inner side of the feet, with the ability to change the horizontal position, dropping down the edges designed to position the outer sides of the feet. Compression springs are located between the base and the leg supports at the edges, designed to position the outer sides of the feet. Each foot support on the upper side has straps for fixing the feet and clamps for heels, and on the opposite side, on the edge intended for arranging the outer sides of the feet, has seating for mounting the upper parts of the compression springs. Base has seats for the lower parts of the compression springs.EFFECT : invention provides active strengthening of the muscular-ligamentous apparatus of the feet, that makes it possible to avoid flat-footedness, removal of the load from the knee joints and the spine.1 cl, 2 dwg