A vehicle charge system, comprising: a driving battery arranged to feed power to a running motor of a vehicle; an auxiliary battery arranged to feed power to an auxiliary machine of the vehicle; a charge control portion arranged to control charging of each of the driving battery and the auxiliary battery; a driving battery charge apparatus arranged to be controlled by the charge control portion and charge the driving battery; and an auxiliary battery charge apparatus arranged to be controlled by the charge control portion and charge the auxiliary battery, the vehicle charge system being characterized in that: the driving battery charge apparatus is formed of, a first control circuit, a first power-supply circuit arranged to supply power to the first control circuit, and a first charge circuit that is capable of charging the driving battery, and the first power-supply circuit has means for supplying power at least from an outside power supply to the first control circuit; and the auxiliary battery charge apparatus is formed of, a second control circuit, a second power-supply circuit arranged to supply power to the second control circuit, and a second charge circuit that is capable of charging the auxiliary battery, and the second power-supply circuit has means for supplying power at least from the outside power supply to the second control circuit; and the auxiliary battery is arranged to be charged from the driving battery under the control of the charge control portion when a voltage across the auxiliary battery is equal to or higher than a predetermined constant value, and the outside power supply is arranged to supply power to the second control circuit when a voltage across the auxiliary battery is below the predetermined constant value, so that the auxiliary battery is charged on its own without being controlled by the charge control portion. a driving battery arranged to feed power to a running motor of a vehicle; an auxiliary battery arranged to feed power to an auxiliary machine of the vehicle; a charge control portion arranged to control charging of each of the driving battery and the auxiliary battery; a driving battery charge apparatus arranged to be controlled by the charge control portion and charge the driving battery; and an auxiliary battery charge apparatus arranged to be controlled by the charge control portion and charge the auxiliary battery, the vehicle charge system being characterized in that: the driving battery charge apparatus is formed of, a first control circuit, a first power-supply circuit arranged to supply power to the first control circuit, and a first charge circuit that is capable of charging the driving battery, and the first power-supply circuit has means for supplying power at least from an outside power supply to the first control circuit; and the auxiliary battery charge apparatus is formed of, a second control circuit, a second power-supply circuit arranged to supply power to the second control circuit, and a second charge circuit that is capable of charging the auxiliary battery, and the second power-supply circuit has means for supplying power at least from the outside power supply to the second control circuit; and the auxiliary battery is arranged to be charged from the driving battery under the control of the charge control portion when a voltage across the auxiliary battery is equal to or higher than a predetermined constant value, and the outside power supply is arranged to supply power to the second control circuit when a voltage across the auxiliary battery is below the predetermined constant value, so that the auxiliary battery is charged on its own without being controlled by the charge control portion. the driving battery charge apparatus is formed of, a first control circuit, a first power-supply circuit arranged to supply power to the first control circuit, and a first charge circuit that is capable of charging the driving battery, and a first control circuit, a first power-supply circuit arranged to supply power to the first control circuit, and a first charge circuit that is capable of charging the driving battery, and the first power-supply circuit has means for supplying power at least from an outside power supply to the first control circuit; and the auxiliary battery charge apparatus is formed of, a second control circuit, a second power-supply circuit arranged to supply power to the second control circuit, and a second charge circuit that is capable of charging the auxiliary battery, and a second control circuit, a second power-supply circuit arranged to supply power to the second control circuit, and a second charge circuit that is capable of charging the auxiliary battery, and the second power-supply circuit has means for supplying power at least from the outside power supply to the second control circuit; and the auxiliary battery is arranged to be charged from the driving battery under the control of the charge control portion when a voltage across the auxiliary battery is equal to or higher than a predetermined constant value, and the outside power supply is arranged to supply power to the second control circuit when a voltage across the auxiliary battery is below the predetermined constant value, so that the auxiliary battery is charged on its own without being controlled by the charge control portion.