Airbag device and vehicle with same

The invention discloses an air bag device and a vehicle with the same, the air bag device is arranged on one side of a seat of the vehicle in the left-right direction, and the air bag device comprises an air bag body and an air generator. An inflation inlet is formed in the rear side of the air bag body, a main protection cavity, a front cavity and a rear cavity which are communicated with the inflation inlet are defined in the air bag body, the front cavity and the rear cavity are located on the front side and the rear side of the main protection cavity respectively, a first guide pressing line is arranged on the air bag body, and one end of the first guide pressing line is connected with the edge, located on the lower side of the inflation inlet, of the air bag body. The other end of the first guide pressing line extends forwards and downwards, and the first guide pressing line and the inner wall of the air bag body define the rear cavity. The gas generator is arranged on the rear side of the air bag body a