To effectively joining the electrode of aluminum, stainless steel, or the like to an oxide thermoelectric conversion material by using a brazing material with a wetting property and a property for the solid solution of oxygen for the oxide thermoelectric conversion material.

An electrode is joined to an oxide thermoelectric conversion material via a brazing material 8. In this case, the brazing material 8 with a wettability and a property for forming the solid solution of oxygen for the oxide thermoelectric conversion material is used. More specifically, it is necessary that the brazing material 8 used for the junction should have a wettability and a property for forming the solid solution of oxygen for the oxide thermoelectric conversion material, thus effectively joining the electrode to the oxide thermoelectric conversion material.