The present invention relates to a near-infrared ray thermal sitz bath machine for muscle pain alleviation and blood circulation improvement added with a spine radiation function including a case with a hollow structure having an open upper portion surface that is divided into a first thermal space and a second thermal space； a saddle plate that is provided to open and close the upper portion surface of the first thermal space portion and includes a body where an opening portion is formed and coupling protrusion ends which are formed in both end portions of one side surface of the body； a first thermal unit that is built into the first thermal space portion of the case； a first vertical plate that is vertically provided to separate the first thermal space portion from the second thermal space portion and is provided with a through-opening portion where a plurality of through-holes are formed in an upper end portion； a second vertical plate that is disposed in the second thermal space portion facing the first vertical plate； a second thermal unit that is interposed between the first vertical plate and the second vertical plate； and upper plate that is disposed to open and close an upper portion surface of the second thermal space portion； and a controller that controls each of the first and second thermal units. According to the present invention, wood-based insertion fitting assembly is performed for excellent productivity and easy repair and maintenance and thermal spine treatment is added to thermal effects for a perineal region, an anus, and male and female reproductive organs so that muscle pain alleviation and blood circulation improvement can be performed. In addition, emission of phytoncide and anions in quantity is available along with thermal treatment and a forest therapy effect can be provided in a case where wood for medicinal purposes such as fire tree and Oriental arbor vitae are used.본 발명은 척추 조사 기능을 부가한 근육통 완화 및 혈행 개선 근적외선 온열 좌욕기에 관한 것으로, 상부면이 개방된 중공구
