LOWER STRUCTURE OF VEHICLE

A protection member arranged below a frame member so as to face an onboard member from an outward side, in a vehicle width direction, thereof and a support member fixed to a lower face of the frame member so as to support the protection member are provided. The support member comprises a bottom wall portion including a facing portion which faces an upper end portion of the protection member in a vertical direction and extending along a lower face of the frame member and a vertical wall portion having a base end thereof which corresponds to an inward edge of the bottom wall portion and extending downward. The vertical wall portion is provided with a curve portion protruding inward and an extension portion extending toward a tip side from the curve portion and positioned on the outward side, in the vehicle width direction, of the curve portion.