The present invention relates to a portable thermotherapy device comprising: a body portion having an empty space capable of accommodating external parts at a back inside an upper handle portion formed at the upper surface of the body portion and a part accommodation portion for accommodating external parts for thermotherapy formed separately from the body portion, wherein the body portion and the part accommodation portion are detachably coupled, and the upper portion of the portable thermotherapy device is opened. The part accommodation portion comprises: a front panel corresponding to the inner surface of the body portion a rear panel for forming the rear end of the body portion if coupled to the body portion a left panel and a right panel corresponding to the both left and right lateral sides of the body portion to be placed inside the body portion and a bottom panel corresponding to the bottom surface of the body portion and forming the bottom surface. According to the present invention, parts for thermotherapy can be conveniently used, and it is possible to prevent damage to the parts by impact when the parts are put into or drawn out of the body portion.
