A vehicle seat includes a seat cushion frame, a slide mechanism, a drive source, and a transmission mechanism configured to receive a driving force from the drive source and to cause the seat cushion frame to move in a front-rear direction. The slide mechanism includes a guide member extending in the front-rear direction and a slide member movable along the guide member relative to the guide member; the seat cushion frame is fixed to one of the guide member and the slide member, and another of the guide member and the slide member is fixed to a floor of a vehicle; and the drive source is fixed to the floor of the vehicle.