Hood airbag assembly

An airbag case that stores an airbag is disposed on a hood inner panel (44) at a location close to an engine compartment. The airbag case is not fixed directly to a hood outer panel (42). An opening is formed in a portion of the hood outer panel located on a rear side of the airbag case (76) as viewed in the longitudinal direction of the vehicle. In the opening, there is provided a hood garnish panel (48) that turns over rearward upon deployment of the airbag.