PURPOSE: To provide a floor board for an automobile to relieve a labor for outputting and inputting a cargo through simple constitution.

CONSTITUTION: A a rear seat is arranged at a wagon vehicle and a luggage floor is formed at the rear part of a rear seat. The luggage floor comprises a deck floor and a loading height. A deck floor is formed in a recessed state, a frame type board 11 and a floor board 12 are disposed, and the recessed parts thereof are covered. The floor board 12 is placed on the inner frame part 14 and the rear frame part 13c of a frame board 12. The floor board 12 comprises a board body 18 and a carpet 19 and a plurality of guide rail parts 20 are formed on a board body 18. The guide rail part 20 is formed in an arcuate shape in cross section. A carpet 19 is adhered to a board body 18 between guide rail parts 20.