Abstract: Mobility device for physically disabled people 1, comprising a chassis 10 with at least one motor for maneuvering the entire mobility device 1; a pivot arm 20, which at its lower end 22 is pivotably connected to the chassis 10; and a pelvis support 40, which is connected to an upper end 23 of the pivot arm 20; wherein a physically disabled person 2 can sit with the pelvis support 40 attached to its body, can move around with the mobility device 1 in a standing position on the chassis 10, and can change on its own from sitting to standing position, wherein all elements of the mobility device 1 except the elements directly contacting the body of the person 2 extending above pelvis height h of the sitting person 2 can be lowered or moved to or below this height h. The present invention further comprises a method for erecting of a sitting physically disabled person 2 and for fixing of the person 2 in standing position onto a motor-driven mobility device 1.