To provide an air suspension device suitable for a rear two-axle vehicle.

This air suspension device for a rear two-axle vehicle having a start assist operation control means increasing a pressure in a drive axle side communication path 11 over a pressure in a dead axle side communication path 12 at the time of start assist operation comprises electromagnetic valves 17 and 18 opening and closing the drive axle side communication path 11 and the dead axle side communication path 12, respectively. The electromagnetic valves 17 and 18 are controlled so as to close when the vehicle is turned and open when not turned for suppressing the vehicle from rolling.