Heating control device, heating cooker, and heating control method and program for defrosting an object with high quality using steam regardless of the type of object to be heated

The invention provides a heating control device, a heating cooker, a heating control method and a heating control program that can defrost an object with high quality. The heating control device includes: a supply processing part that supplies steam from a steam supply part into a storage box that stores objects to be heated; and a circulation processing part that uses a circulation part to circulate air in the storage box that has been supplied with the steam. The supply processing part supplies a first supply amount of steam into an accommodation chamber from the steam supply part during a first period in which the target temperature in the accommodation chamber is set to a first target temperature corresponding to the object to be heated. In a second period following the first period in which the target temperature is set to a second target temperature lower than the first target temperature, the supply processing part enables the steam supply part to supply steam into the accommodation chamber, wherein th