An information processing device has: a support stand having a base that lies flat and a pole that stands on the base; a processing unit that performs data processing; a display panel that displays an image; and a storage unit that stores information. The device further has an adaptor that supports the processing unit and the storage unit, when the adaptor is attached to the support stand. The adaptor also supports the display panel such that the processing unit and the storage unit are hidden behind the display panel.