Abstract: A seat apparatus allows a seat back to incline forward and to return to an upright position under control from a position inside a passenger vehicle away from the seat. A wire and an operation member are interlocked with an unlocking lever of a reclining unit. The apparatus can include a driving unit which can cause the seat back to incline forward. A rotation unit can be included in a reclining unit. When a notch on a rotating sector gear in the rotation unit comes into contact with a projection on a seat back side bracket, the seat back can be raised from an inclined position to a more upright position.