The present invention suppresses vibration of a floor panel starting from corners of bulges in the panel and decreases noise in the cabin while ensuring floor panel rigidity by linking the bulges and a bead with the shapes and positions of the bulge and the bead related to one another without an increase in weight or the number of components. In a vehicle floor panel structure a floor panel (1) is provided with bulges (5 , 6 , 7 , 8) including linear portions (51 , 61, 71 , 81) and corners (52 , 62, 72 , 82) and with a linear bead (9) disposed adjacent to the bulges (5 , 6, 7 ,8) , the bulges and the bead bulging upward or downward of a vehicle. The corners (52, 62, 72 , 82) of the bulges are formed in arc shape as viewed in plan ,with a vertical wall portion (9b) of the bead (9) curving around and linked with an arc shape portion of the corners.
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