Fuel battery generates electric power using a predetermined fuel, and
activation and deactivation of the electric power generation can be
controlled in accordance with whether or not the fuel should be supplied
to the fuel battery. The electric power is supplied to individual
circuits/devices of a tone generation section, so that a tone is
generated by any of the circuits/devices operating in response to
operation of a performance operator unit. The circuits/devices are
allowed to electrically operate for a long time with the electric power
supplied by the fuel battery. In this way, an electronic musical
instrument using the fuel battery can operate for a long time as compared
to the conventional electronic musical instruments using a dry battery or
storage battery (secondary battery).