To provide a current breaking method capable of blocking a circuit from a power source after a prescribed accumulated current supplying period by utilizing electro-migration, and to provide a current breaking element used for the current breaking method.

A prescribed current I is made to flow through a conductive thin film 3 to be broken by electro-migration, through which a current is made to flow, and the current breaking element A having a resistor film 4 for electric heating heating the conductive film 3 up to a prescribed temperature, while current is flowing through a circuit Z. When the accumulated current supplying period reaches a prescribed value, the circuit Z is blocked from the power source S by a wire breakage caused by the electro-migration of the conductive thin film 3.