Vehicle body floor structure
Left and right floor frames (15) each have a U sectional shape having an upward opening and is fixedly joined at upper end edge portions (15a, 15b) of the opening to the lower surface of a floor panel (41). Left and right floor frame reinforcing members each extend forward from near a raised floor portion (51) and has an inverted U sectional shape having a downward opening. Each of the reinforcing members is fixed at its lower end edge portions (72, 73) of the downward opening to the upper end edge portions of a corresponding one of the floor frames with the floor panel sandwiched therebetween and with closed sectional shapes defined over and under the floor panel.