To provide a vehicle with an air bag device for rear collision capable of obtaining a shock absorbing function and an occupant restraining function of the air bag device for rear collision by surely deploying and expanding an air bag cushion between a head of an occupant and a trunk lid even if a seat back is inclined backward due to shocks at the time of a rear collision in a vehicle with the air bag device for rear collision.

This air bag device 2 is installed at the lower end periphery of a back window 11 formed at the top of a trunk lid, and comprises air bag cushions 21, 21 deployed and expanded at the time of a rear collision, inflators 22, 22 supplying high-pressure gas to the air bag cushions 21, and gas supply pipes 23, 23 connecting the inflators 22 with the air bag cushions 21.