A vehicular seat device has a first linking member (21) that is linked to a front portion of a seat cushion frame (16) and to a base member (24) so as to be respectively pivotable, and a second linking member (22) that is pivotably linked to a rear portion of the seat cushion frame (16) and is also pivotably linked to a position on a seatback frame (18) which is upward of a reclining mechanism (26) when the seatback is in a standing state. The seat arrangements thereof include a retracted state in which the seatback (14) is superimposed on the upper side of the seat cushion (12), and an entry/exit state in which the seat cushion (12) is placed in the standing state producing a space for an occupant's entry or exit behind the seat.