Length adjustable hand grip for vehicle

The present invention provides a height adjustment handle of a vehicle. The height adjustment handle of a vehicle includes: a rotation unit including a rotation shaft, a spring drum with a built-in spiral spring which is coupled to an end of the rotation shaft, and a rotation gear coupled to the other end of the rotation shaft; an elastic support unit which is fixed on the ceiling or inner walls of a vehicle to elastically support the rotation unit; a rotation control unit including a hydraulic cylinder which operates while being linked to the vertical movement of the rotation shaft of the rotation unit and a stop rod which moves in the vertical direction by being linked to the operation of the hydraulic cylinder to control the operation of the rotation gear; a handle belt which is partially wound around the rotation shaft and is wound or unwound according to the rotation of the rotation shaft; and a handle which is connected to an end of the handle belt.