To provide an inexpensive heating steam generating device with a simple structure, capable of using commercial power supply and easily generating heating steam.

This heating steam generating device is provided with a pipe body comprising electrically conductive ceramic etc. which has predetermined length and inside of which a passage is formed; a power supply means for supplying a commercial alternating current to the pipe body; and a control means for controlling operation of the power supply means. By supplying a predetermined commercial alternating current from the power supply means to the pipe body by control of the controlling means and causing self-heating of the pipe body, heating steam is discharged from a discharge port of the pipe body. A heating promoting means comprising fins for promoting heating and a porous chamber part etc. is provided inside the passage of the pipe body.