A device according to one mode of the present disclosure relates to a device for controlling the output of a power storage device that is chargeable and dischargeable. This output control device includes: an obtainment section configured to obtain a remaining charged power amount at a present time point of the power storage device; and a control section configured to set an operation range of the remaining charged power amount of the power storage device. The control section performs at least one of gradual decrease processes including: a first gradual decrease process in which, when the obtained remaining charged power amount is not less than a lower limit value of the operation range, a maximum discharge power of the power storage device is caused to gradually decrease over a predetermined deferment period; and a second gradual decrease process in which, when the obtained remaining charged power amount is not greater than an upper limit value of the operation range, a maximum charge power of the power storage device is caused to gradually decrease over a predetermined deferment period.