A grille shutter is fixed to a radiator grille at end portions of the grille shutter in the vehicle right-left direction. A restriction mechanism includes a restriction member provided to the radiator grille and a restriction member abutting portion provided to an intermediate portion of the grille shutter in the vehicle right-left direction. The restriction mechanism restricts the intermediate portion of the grille shutter from moving toward the vehicle rear side relative to the radiator grille. The restriction member is configured to be movable toward the vehicle rear side relative to the restriction member abutting portion.