Distillation method and distillation apparatus.

Problem to be solved. To enhance efficiency of distillation operation by generating Joule heat in a distillation raw-liquid without applying heat to the distillation raw-liquid from the outside. Solution. A distillation apparatus 10 includes a distillation raw-liquid storage tank 11 and a distillation heating pipe 12, and a distillation raw-liquid M in the distillation raw-liquid storage tank 11 is returned to the distillation raw-liquid storage tank 11 via a circulation pipe 23. The distillation raw-liquid M flowing in a heating flow path 13 is heated via Joule heat generated by current flowing through an electrode member 24. Steam generated from the distillation raw-liquid M in the heating flow path 13 by the heating is cooled by a cooling unit 31 so as to be aggregated. A condensed distillate L is collected into a collection tank 38.