HEATING COOKER

PROBLEM TO BE SOLVED: To suppress clogging by preventing the accumulation of scale near a water supply inlet 104 and a water supply outlet 104a of a boiler 43.SOLUTION: The heating cooker includes a heating chamber 28 for storing foods, and the boiler 43 supplying water vapor generated by heating water to the heating chamber 28. The boiler 43 includes a water vapor generating space 103 inside, which is formed of a heating bottom surface 43g and a plurality of heating side surfaces 43f contacted with the heating bottom surface 43g. A heat generating part 43c is arranged on the outer peripheral side of the water vapor generating space 103. The water supply inlet 104 with a flow passage part 104k for passing water for supplying the water in the water vapor generating space 103 is arranged in the heating side surface 43f. A jetting opening 44 for jetting the water vapor in the heating chamber 28 from the water vapor generating space 103 is arranged on the heating side surface 43f. In the flow passage part 104k for passing the water passed through the water supply inlet 104, the opening area of the water supply outlet 104a contacted with the heating side surface 43f is larger than that of the water supply inlet 104c side from which the water flows out, and moreover, a slope 104h for letting the water flow out is arranged on the water vapor generating space 103 side.