A length-adjustable hand strap for a bus is provided to prevent accidents in a bus in case of rapid braking and start by allowing length of the hand strap to be adjusted according to height of passengers. A length-adjustable hand strap for a bus comprises a connecting stripe(1), a ring(2) and a rotation shaft. The connecting stripe has one end fixed to a bus roof and the other end linked to the ring. The other end of the connecting stripe is fixed to the rotation shaft installed inside the ring and wound, thereby allowing length of the connecting stripe to be adjusted.
