LOWER STRUCTURE OF ELECTRIC VEHICLE

[Task] To simultaneously improve battery capacity and protect a battery during a lateral collision without causing a weight increase, a cost increase, and the like.[Solution] An electric vehicle 1 includes: a battery unit 4 arranged below a floor panel 61 and arranged between a tunnel side frame 63 and a floor side frame 66; and an attachment bracket 8 connecting the battery unit 4 to the tunnel side frame 63 and the floor side frame 66. The attachment bracket 8 has:a lower wall portion 80 supporting a bottom portion of the battery unit 4; an outer vertical wall portion 81 extending upward from an end portion on an outer side of the lower wall portion 80 and connected to the floor side frame 66; and an inner vertical wall portion 82 extending upward from an end portion on an inner side of the lower wall portion 80 andconnected to the tunnel side frame 63. A connected position between the inner vertical wall portion 82 and the tunnel side frame 63 is located higher in the vehicle than a connected position between the outer vertical wall portion 81 and the floor side frame 66.