To provide a continuous producing method which unnecessitates large scale equipment and efficiently produces spindle-shaped calcium carbonate.

In the first process, milk of lime is partially carbonated by a semi-batch carbonation method or the spindle-shaped calcium carbonate crystal (seed crystal) is mixed to the milk of lime in such a manner that 5-30% of the milk of lime comes to a carbonated state. In the succeeding second process, the milk of lime which is partially carbonated or is mixed with the seed crystal is brought into contact with carbon dioxide or a gas containing carbonating gas and is continuously carbonated while being maintained at pH 10-12 and calcium carbonate is recovered from the overflow. In the first process, the carbonation initiation temperature is preferably kept at 20-60°C.