A vehicle floor structure includes: a floor tunnel extending in a vehicle-longitudinal direction at a center in a vehicle-width direction of a vehicle; and a floor pan fixed outward of the floor tunnel in the vehicle-width direction. The floor tunnel includes a top wall having a plate-like shape, a side wall extending downward from an edge of the top wall in the vehicle-width direction toward the floor pan, a tunnel reinforcement covering a corner ranging from the edge to an upper edge of the side wall in the vehicle-upward direction, and a reinforcement member provided on the side wall. A part of the reinforcement member is placed on an outer surface of the tunnel reinforcement, and is fixed to the outer surface of the tunnel reinforcement at a position adjacent to a front end of the floor tunnel.