To reduce wind noises generating in a gap between the vehicle body and a roof spoiler by improving the roof spoiler.

A hollow roof spoiler 1 is installed to near the upper edge of a vehicle rear window 2 extending in the direction of the vehicle width over the rear window with a gap 5, with a front surface 12 opposite to the rear window 2 almost in parallel with the rear window 2. A plurality of pieces of through holes 16 are formed in the front surface 12 of the roof spoiler 1. Further, a cylindrical part 17 is provided at the edge of the opening of each through hole 16 protruding inside the roof spoiler 1. A resonator is thereby formed in the roof spoiler 1 comprising the through hole 16, cylindrical part 17 and a hollow part 15 of the roof spoiler.