Patent ID: 8668254

Claim:
A vehicle underfloor structure, comprising: an under cover that covers an underside of a vehicle; and a drain member provided at least in a center region in a vehicle width direction in the under cover, including: a front inclined wall inclined upward toward a back of the vehicle from a front wall end portion extending in the vehicle width direction in the under cover, and provided with a water drain opening penetrating at least part of the front inclined wall; and a rear inclined wall inclined downward from a bent wall portion connected to the front inclined wall toward a rear wall end portion extending in the vehicle width direction in the under cover, and including a traveling airflow adjusting surface provided in a wall surface of the rear inclined wall to adjust a traveling airflow, wherein a recess is formed in the under cover in a front-back direction of the vehicle in such a manner that a first interior angle formed by the front inclined wall is larger than a second interior angle formed by the rear inclined wall, and a length of the front inclined wall is different from a length of the rear inclined wall.