A rice improver containing a gelatinized product of an acid-treated waxy type starch or a gelatinized product of an oxidation-treated waxy type starch, wherein a cold water solubility of the rice improver in pure water at 25 degrees centigrade is equal to or higher than 50%, wherein a content of a fraction of a granular material sieved over 0.5 mm-opening (32 mesh) sieve in the rice improver is smaller than 5% by weight, and wherein a total of contents of said acid-treated waxy type starch and said oxidation-treated waxy type starch over the whole rice improver is equal to or larger than 50% by weight.
