Abstract: A soldering iron rack including a base having an upright support, an electric soldering iron, a holder mounted on the upright support and having a heat-insulative barrel on the inside for holding the electric soldering iron, and a control circuit to detect the temperature of the electric soldering iron when the electric soldering iron is put in the holder so as to cut off power supply from the electric soldering iron when its temperature surpasses the predetermined upper limit value or to heat the electric soldering iron when its temperature drops below the predetermined lower limit value.