PURPOSE: To provide a construction of information processor that plural users can use at the same time.

CONSTITUTION: To make possible information processing operation while housing parts containing plural display devices is separated, each housing part is provided with at least an arithmetic processing function and a radio communication function, and also provided with plural or a single arithmetic processor in total. Consequently, this processor can be usable as plural information processors. Further, cooperative operation environment by plural users with a small oppressive feeling which can not be realized by the use of a conventional single processor is provided.