A pedestrian airbag system according to the present invention includes a hood panel and an airbag which is folded and accommodated in a position downwardly of the rear end portion of the hood panel and which is adapted to be deployed and inflated upward by allowing inflation gas to flow therein. The hood panel includes an outer panel on the upper surface side and an inner panel disposed below the outer panel and set to have higher rigidity than the outer panel for supporting the outer panel, both panels formed of sheet metal. A storage portion for accommodating the airbag is formed from the outer panel near the rear end.