A protection monitoring circuit 101 includes a secondary battery monitoring circuit 120 which detects a state of a chargeable and dischargeable secondary battery 110, and a protection circuit 130 which performs an ON/OFF control of a charge control transistor or a discharge control transistor disposed between the secondary battery 110 and a load or a charger device, and protects the secondary battery 110. The secondary battery monitoring circuit outputs a control signal that compulsively turns on/off the charge control transistor or the discharge control transistor, to the protection circuit. The protection circuit 130 performs the ON/OFF control of the charge control transistor or the discharge control transistor upon receipt of the control signal.