SEAT DEVICE AND SEAT SYSTEM

To prevent leg rests from bumping against each other, for example, and to allow a leg rest of a seat to move even when a power supply failure or the like occurs. The seat device according to a mode of the present invention is equipped with a seat body, a control unit, and a setting means. The seat body has a leg rest. The control unit has a controller. The controller determines whether the seat body is in a first state in which the seat body does not face a seat in front or a seat in back thereof or a second state in which the seat body faces either the seat in front or seat in back thereof. The controller enables an inclination operation command for the leg rest to incline forward when the controller has determined that the seat body is in the first state, and invalidates the inclination operation command when the controller has determined that the seat body is in the second state. The setting means fixes the first state for the determination result from the controller. 本发明的课题在于防止腿拖彼此碰撞等，在发生电源故障的情况下确保自身座椅的腿拖