UNDERCOVER STRUCTURE

The present invention provides an undercover structure capable of attaining the running stability/handling stability/comfort of the vehicle at a high level. In the undercover structure according to the present invention, a first cover part (15a) that is a lowermost part of an undercover has a first rear end (15a2) positioned ahead of a front wheel axle (21). This generates a strong negative pressure in a region ahead of the front wheel axle (21). Accordingly, a flow rate of air flowing to a wheelhouse (23) decreases (a flow rate of airflow between a road and a vehicle generated along a bottom surface of the first cover part (15a) of the undercover (15) increases). This causes an attraction force that attracts the vehicle (11) to a road surface to act on a vehicle body (13) of the vehicle (11), thereby making traveling stability more excellent. 本发明提供能够以高水准获得车辆的行驶稳定性/操纵稳定性/舒适性的底罩构造。在本发明的底罩构造中，使底罩(15)中的作为位于最下方的部分的第1罩部(15a)的第1后端部(15a2)与前轮车轴(21)相比位于前方侧。由此，在与前轮车轴(21)相比的前方侧的区域中形成强负压区域。从而，空气向车轮罩23的流量减少(在底罩(15)中的第1罩部(