A rear suspension structure for large vehicles increases durability of a bump stopper and an air spring, thus markedly enhancing the riding comfort and handling ability of a vehicle. Furthermore, the amount of air to be drawn into and discharged from the air spring is increased, so that stable handling ability of the vehicle is ensured, thus markedly enhancing traveling stability of the vehicle. As well, the present invention ensures the lateral rigidity of a rear axle and prevents deflection of the vehicle when traveling.