This invention provides a cooked-rice improver having flavor sustaining and/or flavor enhancement effects of cooked rice. The improver is obtained by mixing low-decomposition starch having a predetermined molecular weight and dextrin having a predetermined DE value at a predetermined ratio. This invention provides a cooked-rice improver flavor sustaining and/or flavor enhancement actions on cooked rice, and cooked rice produced by using the same. The cooked-rice improver contains low-decomposition starch having the molecular weight of 500,000 to 5,000,000 and dextrin having a DE value greater than one and equal to or lower than fifty at a ratio of 1:9 to 9:1 in a mass ratio.