Seat device for a vehicle and vehicle provided therewith

There is provided the seat device for a vehicle, which is disposed on the rear floor panel 6 in the cabin 2 equipped with the ingress and egress opening 23 at the side, comprising the first seat 31 being provided so as to be folded, the second seat 32 being provided beside the first seat, and the second-seat moving mechanism (the seat slide rails 51, 51) to move the second seat 32 laterally to the space alpha of the original existing location of the first seat 31 before the first seat has been folded. Accordingly, there can be provided a storage space beside the seat to allow an easy loading (easy access) from the outside of the vehicle, thereby improving facilities of the vehicle.