The airbag device for pedestrian protection includes an airbag to be inflated in front of the vehicle and then be disposed between a pedestrian and the vehicle. The airbag includes a front cover portion and two fall preventing portions. The front cover portion covers the front side of the vehicle. The fall preventing portions cover the vicinities of the left and right edges of the top surface of the hood panel, respectively, and are projected upward so as to prevent the pedestrian from falling down. The airbag device for pedestrian protection is able to prevent the pedestrian mounted on a hood panel from falling down on road surface.