LOWER VEHICLE-BODY STRUCTURE OF AN ELECTRIC VEHICLE, VEHICLE-BODY STRUCTURE OF AN ELECTRIC VEHICLE, AND ELECTRIC VEHICLE

There is provided a lower vehicle-body structure of an electric vehicle 1 that can ensure desired resistance to rear-end collision even if a tunnel of a front floor panel 8 is eliminated, wherein the lower vehicle-body structure of the electric vehicle 1 includes: a pair of left and right side sills 7; a substantially flat front floor panel 8; a first floor cross member 30 and a second floor cross member 40 connecting the left and right side sills 7 in a vehicle-width direction; a kick-up portion 9 raised from a rear end of the front floor panel 8 toward a vehicle upper side; a rear floor panel 10 connected to a vehicle rear side of the kick-up portion 9; and a kick-up reinforcing element 50 connecting a substantial middle of the kick-up portion 9 in the vehicle-width direction and the front floor panel 8 in front of the substantial middle of the kick-up portion 9.