To provide a method and device for accurately measuring the internal impedance of a storage battery without being affected by a noise component of a charge device or connected load.

In the internal impedance measuring method of the storage battery for measuring the internal impedance of the storage battery with an alternating current generating section, an alternating voltage measurement section, and an alternating current measurement section, the internal impedance measuring apparatus measures noise voltage at a plurality of different frequencies from the storage battery, and measures the internal impedance of the storage battery with the frequency of low noise voltage level, of the measured noise voltage.