PURPOSE: To provide tundish exchanging method in continuous casting equipment, which improves working ratio of the continuous casting equipment by shortening exchanging work of the tundish and can cope with little lot production.

CONSTITUTION: Before completing the continuous casting executed by pouring molten metal into a mold 9 from the first tundish 5 loaded on the first tundish car 3 at casting position a, the molten metal quantity as capable to pour molten metal in the mold from the second ladle 16, beforehand poured into the second tundish 6 loaded on the second tundish car 4 and set to waiting position b before shifting to the casting position a.