A charging device for a secondary battery, comprising: a charging power supply capable of outputting power for charging a secondary battery; charging power detection means for detecting power to be charged to the secondary battery by the charging power supply; full charge determination means for making a full charge determination if chargeable power calculated based on a detection value of the charging power detection means becomes equal to or less than predetermined power set in advance; charging control means for repeatedly executing a charging control of supplying power to the secondary battery from the charging power supply until the full charge determination is made, stopping the supply of power to the secondary battery from the charging power supply when the full charge determination is made, resuming the supply of power upon the elapse of a predetermined time after the supply of power is stopped and continuing the supply of power until the full charge determination is made again until the number of times of the full charge determination reaches a full charge determination count which is a predetermined count; and temperature detection means for detecting the temperature of the secondary battery; characterized by full charge determination count setting means for setting the full charge determination count at least based on the temperature detected by the temperature detection means when the full charge determination is made, wherein the full charge determination count setting means sets a larger full charge determination count as the temperature detected by the temperature detection means decreases. a charging power supply capable of outputting power for charging a secondary battery; charging power detection means for detecting power to be charged to the secondary battery by the charging power supply; full charge determination means for making a full charge determination if chargeable power calculated based on a detection value of the charging power detection means becomes equal to or less than predetermined power set in advance; charging control means for repeatedly executing a charging control of supplying power to the secondary battery from the charging power supply until the full charge determination is made, stopping the supply of power to the secondary battery from the charging power supply when the full charge determination is made, resuming the supply of power upon the elapse of a predetermined time after the supply of power is stopped and continuing the supply of power until the full charge determination is made again until the number of times of the full charge determination reaches a full charge determination count which is a predetermined count; and temperature detection means for detecting the temperature of the secondary battery; characterized by full charge determination count setting means for setting the full charge determination count at least based on the temperature detected by the temperature detection means when the full charge determination is made, wherein the full charge determination count setting means sets a larger full charge determination count as the temperature detected by the temperature detection means decreases.