Patent ID: 7661752

Claim:
An under cover for covering a base face of a vehicular body, comprising: a dent part; and a protruding part, the dent part and the protruding part being formed alternately in series on a lower face of the under cover in at least a forward-rearward direction of a vehicle, the dent part and the protruding part having a cross section formed into a serial curved face, wherein relative to a road surface, the protruding part is positioned substantially as high as or higher than another under cover in a forward position of the under cover in the forward-rearward direction of the vehicle; wherein the under cover is configured such that, when a small turbulence occurs in an inner part of the dent part and a turbulence layer attributable to the turbulence is formed substantially entirely below the lower face of the under cover, the turbulence layer allows an entire air flow to be spaced apart from the lower face of the under cover; and wherein the under cover has a plurality of dent parts and protruding parts formed alternately in the forward-rearward direction of the vehicle such that a continuously wavy surface is formed.