Disclosed is a method and apparatus adaptable for various kinds of raw rice and a variety of finally cooked rice, which comprises a combination of a steaming line constructed of a single endless conveyor and a settling and/or cooling line constructed of a plurality of combined endless conveyor belts arranged downstream of the steaming line. The settling and/or cooling line is combined with the rice continuously steaming line which comprises the steps of placing rice, that has finished preliminary water absorption, on a carrying surface of a single conveyor belt evenly, moving the carrying surface while blowing steam to the rice placed on the carrying surface, and effecting primary steaming of the rice, sprinkling of hot water to absorb water into the rice, and secondary steaming of the rice having absorbed water successively during movement of the carrying surface without agitating the rice, the above steps being performed within a sealed housing. Hot water is sprinkled to absorb water into the rice at the same time as when steam is blown to the rice. The variety of cooked rice include rice steamed in a state completely changed into .alpha.-starch, the steamed rice being selected from the group consisting of white rice, Sushi rice, seasoned rice, red rice, glutinous rice, sake rice and rice cakes. The variety of cooked rice may include rice steamed in a state partly changed into .alpha.-starch for quick cooking.