A kettle for cooking food is provided to economize energy by heating small amount of heat medium fluid and then heating indirectly food while considering expansion of volume due to heating. A kettle for cooking food comprises food cooking region(12) in order to cook, formed on inner side of a cooking member; and a heat medium fluid chamber(30) formed between the cooking member(10) and the external member(20). Heat medium fluid chamber is sealed. A specific amount of heat medium fluid is filled in the sealed heat medium fluid chamber in order to heat the cooking member by contacting within case volume due to temperature rise is expanded.
