A rice modifier, containing a granular material sieved over 0.5 mm-opening (32-mesh) sieve at a content of 5% by weight or more and 100% by weight of less, having thermal solubility of equal to or higher than 20%, and containing starch at a content of equal to or larger than 40% by weight.本發明係一種米飯改質劑,其特徵為含有5重量%以上且100重量%以下之網目0.5mm(32篩孔)之篩上的粒狀物,且加熱溶解度為20%以上,澱粉含量為40重量%以上。