There are provided an overcurrent protection circuit which has a smaller circuit area, a charging and discharging control circuit, and a compact battery device. The charging and discharging control circuit includes an overcurrent detection circuit which monitors the voltage of an overcurrent detection resistor connected to an overcurrent detection terminal and which detects the flow of an overcurrent into a secondary battery, an overcurrent release circuit which monitors the voltage at a terminal to which a load is connected through a voltage step-down circuit connected to an overcurrent release terminal and which detects the removal of a load, and a clamping circuit connected to the overcurrent release terminal are provided. The voltage at the overcurrent release terminal is clamped by the voltage step-down circuit and the clamping circuit.