PURPOSE: To enable continuous casting of a casting ingot having a stable surface condition by controlling the drawing speed of the casting ingot in such a way that the position to form the initially solidified surface of the casting ingot detected by the measured value of the temp. near the inside wall at the outlet end of a heated casting mold attains a prescribed standard value.

CONSTITUTION: The temp. of the molten metal 1 in a holding furnace 2 in which a molten metal is held roughly at a specified melt level by supplying the molten metal through an inflow port 3 and discharging the same through an overflow port 4 is held constant via a heater 11 by a thermocouple 10 and a temp. controller 20 and the temp. of the inside wall of a casting mold 5 is maintained at the solidifying temp. of the metal 1 or above in continuous casting for the metal by supplying the molten metal 1 in the furnace 2 into the mold 5, cooling the solidified metal drawn via a dummy casting ingot from the outlet of the mold 5 by a cooler 13 and drawing out continuously the same in the form of a casting ingot 12 by pinch rollers 18. The temp. near the inside wall at the outlet end of the mold 5 is further detected with a thermocouple 9 and the position to form the initially solidified surface of the ingot 12 is detected. The drawing speed of the ingot 12 is controlled via a driving motor 19 of the rollers 18 by a speed controller 22 in such a way that said position attains a standard value.