Oven cookware

To provide a method for heating the inside of a firing furnace in a natural convection manner by means of upper and lower heaters, which enables the temperature of each of the upper and lower parts of the firing furnace to be heated with high accuracy. In the oven cooking device 10, a control device 40 obtains an upper determination result obtained by determining a change state of an upper temperature in the firing furnace 20 from an upper detection temperature of an upper temperature sensor 33 and an upper comparison result obtained by comparing an upper upper upper limit or upper lower limit temperature prediction time with an upper delay reference time, The upper heater is on/off controlled on the basis of the upper determination result and the upper comparison result. A lower determination result obtained by determining a change state of a lower temperature in the firing furnace...