Abstract: A roof panel assembly of a vehicle may include a roof panel made of composite material and assembled in a vehicle roof, and a center rail attached to the bottom surface of the roof panel. Both side end portions of the roof panel is assembled with roof rails of the vehicle. The center rail includes both end portions connected to roof rails of the vehicle, respectively. The roof panel further includes an auxiliary rail attached on the bottom of the roof panel and placed at a location spaced apart from the center rail at a rear side in the fore and aft direction of the vehicle.

Abstract: Provided is a vehicle front portion structure including: front side members that are disposed at right and left side portions of a vehicle front portion and extend in the vehicle front and rear direction; suspension towers that are disposed so as to project in the vehicle upward direction from the front side members; front joining portions that are provided on the suspension towers, join the suspension towers and the front side members to each other, and at which joining between the suspension towers and the front side members are cancelled at the time of a frontal impact; and rear joining portions that are provided on the vehicle rear sides of the front joining portions in the suspension towers and join the suspension towers and the front side members to each other.