A vehicle seat wherein left and right seat backs are attached to left and right seat cushions, respectively, in such a manner as to be folded up thereon. A support shaft is provided on the left and right seat cushions for allowing the left and right seat cushions and the left and right seat backs folded up on the left and right seat cushions to be rotated toward the rear of a vehicle individually. The seat cushions and the seat backs so rotated about the support shaft are stored in a recessed portion in a vehicle body floor. The support shaft is provided on the vehicle body floor so that the support shaft is supported in the vicinity of edge portions of the recessed portion.