To use a blocked rectangular battery by a battery supporting frame by expanding the volume of a gun grip so as to realize using of the blocked rectangular battery in an electric small gun though it has been used only in a large electronic gun.

A decorated and smoothly planed plate is regarded as the surface of a gun, and formed to be the same surface layer continued to a main body to create an expanded space. The battery fitting frame is fitted and fixed to it and an anode contact is provided at its top wall. The anode of the blocked rectangular battery is sent to an electronic circuit in the state of being brought into pressure-contact with a position opposing it by the repulsion of a spiral spring mounted to a grip cover, and the cathode of the block angle battery is sent to the electronic circuit to supply power enough to drive the motor. The battery supporting frame is shaped so as to match with the shape of the blocked battery and the apex angle part of the blocked angle battery is matched with a ridge opposing that of the battery supporting frame to be fitted and slid. Then, after fitting it until reaching the top wall, the top angle part is stabilized in contact with the anode contact. When closing the grip cover after this, a cathode contact is brought into pressure-contact with the spiral spring of the grip cover this time, and held stably.