FIELD: transportation.SUBSTANCE: invention relates to the auxiliary device (1) for the step or curb overcoming by means of movement, in particular for the moving in wheelchair persons with disabilities, and also for persons transported on the gurney intended for the objects transportation. Auxiliary device (1) for persons with disabilities, in particular for the obstacle (200) overcoming on the wheeled vehicle, contains stationary chassis (2) upper platform (4) with possibility of moving along the height lower platform (3), which is arranged to be translationally moved along the relative to the horizontal inclined axis, between the rest position under the upper platform (4) and the unfolded position, at that, the said lower platform (3) comprises housing (40) and two side ribs (41) disposed along the parallel to said axis planes, at that, each side rib (41) comprises upper surface (41a), at that, the upper platform (4) is at least partially rests against the said side ribs (41), wherein the lower platform (3) unfolded position is mechanically determining the upper platform (4) height position, at that, the said side ribs (41) are also forming guide for the vehicle guiding and aligning with the lower platform (3) flap (5) mounted on the upper platform (4) with possibility of mechanical rotation about the axis substantially horizontal and perpendicular to the lower platform (3) translation axis, between substantially vertical rest position and unfolded position, in which it rests against the lower platform (3), at that, the said flap (5) forms coupling between the lower platform (3) and the upper platform (4), at that, the said flap (5) is configured to rotate relative to the said side ribs (41) over at least part of its pivotal movement, and the flap (5) fixing in the rest position mechanical element (71 72) located on the said side ribs (41) and passive relative to the said side ribs (41), and fixing the said flap (5) in the lower platform (3) rest position and rele
