A vehicle includes: a partition that separates a driver cabin into which a driver climbs and a passenger cabin into which a passenger climbs and that is coupled to a roof and a floor; a driver's seat base member to which a driver's seat is fixed; and a side support member that is coupled to the partition and the driver's seat base member and partially located on a lateral side of the buttocks or the hips of the driver seated in the driver's seat. A shoulder anchor of a driver's seatbelt device and a shoulder anchor of a passenger's seatbelt device are fixed to the partition. A side support member restrains the driver from moving in a left-right direction and retains the driver in the driver's seat.