A monitor device includes exterior panel, chassis partly or wholly surrounded by exterior panel, and disposed so as to be movable in an internal space of exterior panel, a base member that movably supports chassis, first switch and second switch that detect a change of a relative position between exterior panel and chassis, a motor that causes chassis to move with respect to the base member, and a CPU that controls driving of the motor in response to a change of a relative position between exterior panel and chassis detected by first switch and second switch.