a b s t r a c tThe effect of heat-moisture treatment (HMT) on the properties of rice starches with high-, medium-and low-amylose content was investigated. The starches were adjusted to 15%, 20% and 25% moisture levels, and heated at 110°C for 1 h. The swelling power, solubility, pasting properties, morphology, enzymatic susceptibility and X-ray crystallinity of the starches were evaluated. HMT reduced the swelling power and solubility of the starches. The strongest effect of HMT occurred on the high-amylose starch; the pasting temperature was increased and the peak viscosity, breakdown, final viscosity and the setback were reduced. HMT increased the starch's susceptibility to a-amylase and promoted a reduction in the starch relative crystallinity.