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 6×10 3 or larger to 4×10 4 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.
