VEHICLE LOWER STRUCTURE

The invention provides a vehicle lower structure which controls the deformation of the periphery of a bottom plate opening part so as to suppress the interference with a component arranged below a bottom plate. The structure is provided with: a bottom plate (2) in which a fuel tank (4) is disposed on the lower side; a bottom plate opening (5) that opens at a position above the pump unit (6) in thebottom plate (2); a groove part (10) which extends in the front-rear direction of the vehicle body on the side of the floor opening part (5) in the vehicle width direction and is recessed downward; and a high-rigidity section (15) that is disposed between the groove part (10) and the floor opening (5) and that reinforces the peripheral edge section (5a) of the floor opening (5) in the front-reardirection of the vehicle. 本发明提供一种车辆下部构造，其控制底板开口部的周缘的变形以抑制与在底板下方配置的部件的干涉。包括：底板(2)，其在下侧配置有燃料箱(4)；底板开口部(5)，其开设在底板(2)中的泵单元(6)的上方位置；凹槽部(10)，其在底板开口部(5)的车宽方向上的侧方沿车身前后延伸并向下方凹设；以及高刚性部(15)，其配置在凹槽部(10)与底板开口部(5)之间，在车辆前后方向上加强底板开口部(5)的周缘部(5