A charging system for an electrically-powered vehicle, comprising: a plurality of chargers that include a first charger and second chargers and that are capable of communicating with one another, each of the chargers including at least one charging port detachably attachable to the electrically-powered vehicle, a charging portion connected to the charging port to output charge power to the charging port in accordance with charge request from the electrically-powered vehicle connected to the charging port, and a controller configured to control the charging portion; and a power sharing cable that connects the charging portions of the chargers, the controller of the first charger being configured, when the charge request power from the electrically-powered vehicle connected to the charging port of the first charger exceeds output power capacity of the charging portion of the first charger, to request one or more of the second chargers having the highest surplus power to output assistance power to the power sharing cable, such a surplus power being acquired from second charger information regarding each second charger, characterized in that the second charger information further includes a total operating time being a sum of times for which the second charger has output charge power and an elapsed time from when the second charger becomes into an idling state, and wherein the controller of the first charger calculates rank values of the second chargers, such rank values being used to determine which one of the second chargers is to become the charger to output the assistance power if and when two or more of the second chargers have the same surplus power, the rank value of each second charger being calculated based on the total operating time and the elapsed time of the second charger as well as the inter-charger distance of the second charger with respect to the first charger. a plurality of chargers that include a first charger and second chargers and that are capable of communicating with one another, each of the chargers including at least one charging port detachably attachable to the electrically-powered vehicle, a charging portion connected to the charging port to output charge power to the charging port in accordance with charge request from the electrically-powered vehicle connected to the charging port, and a controller configured to control the charging portion; and a power sharing cable that connects the charging portions of the chargers, the controller of the first charger being configured, when the charge request power from the electrically-powered vehicle connected to the charging port of the first charger exceeds output power capacity of the charging portion of the first charger, to request one or more of the second chargers having the highest surplus power to output assistance power to the power sharing cable, such a surplus power being acquired from second charger information regarding each second charger, characterized in that the second charger information further includes a total operating time being a sum of times for which the second charger has output charge power and an elapsed time from when the second charger becomes into an idling state, and wherein the controller of the first charger calculates rank values of the second chargers, such rank values being used to determine which one of the second chargers is to become the charger to output the assistance power if and when two or more of the second chargers have the same surplus power, the rank value of each second charger being calculated based on the total operating time and the elapsed time of the second charger as well as the inter-charger distance of the second charger with respect to the first charger.