VEHICLE BOTTOM PART STRUCTURE

To provide a vehicle bottom part structure capable of further improving beam rigidity of a cross member while suppressing an increase in dimension in the vertical direction of the cross member.SOLUTION: A vehicle bottom part structure includes: a cross member 30 disposed to the bottom part of a vehicle and being a skeleton member having a long vehicle width direction; a plurality of column bodies 50 disposed at intervals in the vehicle width direction and each projecting downward from the bottom surface of the cross member 30; and a brace 60 laid over the plurality of column bodies 50.SELECTED DRAWING: Figure 2 【課題】クロスメンバの上下方向寸法の増加を抑えつつ、クロスメンバの梁剛性をより向上できる車両底部構造を提供する。【解決手段】車両底部構造は、車両の底部に配され、車幅方向の長尺な骨格部材であるクロスメンバ３０と、車幅方向に間隔を開けて配された複数の柱体５０であって、それぞれが前記クロスメンバ３０の底面から下方に突出する複数の柱体５０と、複数の前記柱体５０の間に掛け渡されるブレース６０と、を備える。【選択図】図２