A current interrupting device includes a current limiting element on a power supply path from a predetermined power supply to a load device. The current limiting element is configured to exhibit a current limiting action when current flowing in the power supply path exceeds a first current threshold value. The current interrupting device further includes a current diversion path switch, and a controller programmed to control on and off of the current diversion path switch. The controller is programmed to switch a current diversion path switch on from an off state when it is detected that current flowing in the current limiting element is limited to a second current threshold value after the current flowing in the current limiting element has exceeded the first current threshold value, and switch the switch off again after a predetermined switched-on holding time has elapsed since the switch has been switched on.