Lower structure of vehicle

A lower structure of a vehicle, comprising:

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