Abstract: [Problem] To provide cooked rice in which aging can be suppressed without using low-amylose rice and which shows little deterioration in taste even after storing at ordinary or low temperatures. [Solution] In a rice cooking device provided with a conveying means such as a conveyor for conveying rice having been soaked in water, a steamer for steaming the rice on the conveyor with hot steam, and a water sprinkler for supplying warm water to the rice on the conveyor in the steamer, warm water is poured in an amount exceeding the amount required for cooking the rice in the aforesaid step for steaming in the steamer so as to wash away amylose eluted from the rice.