To solve a problem that exchange of a dry cell battery or the like is frequently required because a conventional wireless mouse does not have a cord for supplying electric power.

A wireless mouse not requiring at all the exchange of the dry cell battery or the like which is disadvantage of the conventional wireless mouse is realized by setting a charging unit (3) both in a receiver (1) and in a mouse body (2) and by taking a structure capable of transmitting electricity stored by the charging unit (3) of the receiver (1) to the charging unit (3) of the mouse body (2).