Front seat assembly for a vehicle

Disclosed is a front seat assembly for a vehicle, on which three passengers are sitable. The front seat assembly includes: a driver seat and an assistant seat installed in a front portion of an inside of the vehicle and spaced apart by a predetermined distance, in which each of the driver seat and the assistant seat has a seat cushion for supporting a passenger's lower portion of the body and a seatback installed upright in a rear portion of the seat cushion so as to support the passenger's back; and a middle seat installed between the driver seat and the assistant seat, including a seat cushion foldably installed in the seat cushion of the assistant seat, a seatback foldably installed in a rear portion of the seat cushion of the middle seat, and an armrest protruded behind the seatback of the middle seat so as to allow the driver to put the driver's arm thereon.