The cell controller according to the present invention used in a cell monitoring device for monitoring a battery pack having one or more cell groups in which a plurality of galvanic cells are connected in series is provided with a starting terminal to which a first discharging resistor is connected and to which a starting voltage is applied, and a cell balancing unit for executing cell balancing for adjusting the capacity of the plurality of galvanic cells while the starting voltage is equal to or greater than a predetermined voltage, the starting voltage being applied for a predetermined time from a first timer having a passive element capable of accumulating electrical energy and capable of discharging electrical energy to the starting terminal.
