An airbag device 100 restrains an occupant of a front passenger seat 104 from a front side of the vehicle. The airbag device 100 includes a housing 120 having an opening 132, and a cushion 108 including a main bag 112 inflated and deployed from the housing 120 toward a front side of the front passenger seat 104 and a support bag 114 inflated and deployed from the housing 120 toward a rear side of a center console 116. The main bag 112 and the support bag 114 each have a bag shape and are reduced in size and stored in the housing 120 in a stored form 130 such that the support bag 114 is placed on the main bag 112 on the side of the opening 132.