A defibrillator includes: an impedance measuring section which is configured to obtain an impedance measurement value between a living body of a rescue target and electrodes； a controller which is configured to detect a kind of the electrodes, and which, based on the detected kind of the electrodes, is configured to perform determination of whether the impedance measurement value is to be output or not； and an outputting section which, based on the determination, is configured to output the impedance measurement value.
