Airbag apparatus

An airbag apparatus to be applied to a vehicle includes an airbag, a collision determiner, an airbag deployment controller, and a pulling device. The airbag is configured to be deployed forward of a vehicle body front of the vehicle. The collision determiner is configured to establish a pre-crash determination in a case where a collision probability is equal to or higher than a predetermined threshold. The airbag deployment controller is configured to give to an inflator a command to supply deployment gas to the airbag and deploy the airbag, in response to the pre-crash determination. The pulling device is configured to pull, rearward of the vehicle, a collision portion with which a collision object is to collide or vicinity of the collision portion on a front surface of the airbag so as to form a recessed portion configured to restrain the collision object.