[Object] To enable charging/discharging amounts of secondary batteries connected in series to be accurately obtained without increasing the costs.[Solving Means] A power storage apparatus includes a battery section in which a plurality of power storage element sections each including at least one power storage element are connected in series, a cell-balancing circuit that are connected in parallel to a plurality of power storage element sections and performs a cell-balancing operation between plurality of power storage element sections, a control unit that controls the cell-balancing current flowing through the cell-balancing circuit, and an entire-current measurement section that measures a current value of an entire current flowing through the entire battery section and a cell-balancing current measurement section that measures a current value of the cell-balancing current.