To provide a disposable warmer capable of easily attaching a powder-like far-infrared ray radioactive material to a human body and keeping heating.

The powdered far-infrared ray radioactive material is included into a conventional disposal warmer. Herewith, it becomes easy to attach it to a human body. By heat generated from the warmer itself, it is possible to keep heating the far-infrared ray radioactive material, strengthen the radiating electromagnetic wave more, and it works on human health with great efficiency. Furthermore, while it is careful of component quantity for temperature of the disposal warmer not to turn into 40 degree or less, more efficiency is produced by making the far-infrared ray radioactive material abundant as much as possible.