A monitor device including: a display section having a display surface; an operation section disposed at a bottom of the display section and having an operation surface substantially parallel to the display surface; a connecting section disposed at a lateral side of the operation section and having a connecting surface tilted downward relative to the display surface; and a surface switching section that connects the operation surface and the connecting surface to each other, and a normal of the display surface and a normal of the connecting surface form an acute angle.