Floor Structure for Electric Vehicle

An embodiment floor structure for an electric vehicle includes a floor panel connected to a pair of side sills respectively disposed along a front-to-back direction of a vehicle body on a left side and a right side of the vehicle body, each of the side sills including a sill inner member and a sill outer member connected together, a pair of reinforcement members disposed on an inside of each side sill along the front-to-back direction of the vehicle body, and a fastening device engaged to the sill inner member of one of the side sills and to the reinforcement member on a same side of the vehicle body as the one of the side sills.