Disclosed is a resistant starch-rich starch which satisfies the requirements (a), (b), (c) and (d), below: (a) showing a resistant starch content, measured by the AOAC Official Method 2002.02 for measuring resistant starch, of 60% or more;(b) showing a molecular weight peak in the range from 6×103 or larger to 4×104 or smaller;(c) showing a molecular weight dispersion of 1.5 or larger to 6.0 or smaller; and(d) showing a gelatinization enthalpy, measured by differential scanning calorimetry over the range from 50° C. to 130° C., of 10 J/g or smaller.
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