A safety device of the present invention for a storage battery includes a charge-discharge lead one end of which is connected to a positive electrode side of the storage battery and the other end of which is connected to a positive terminal of the storage battery; pressure-sensing device which deforms in response to the increase of the pressure in the storage battery; and cutting device for cutting the charge-discharge lead, the cutting device being pressed by the deformation of the pressure-sensing device to cut the charge-discharge lead. <IMAGE>
