The utility model means a kind of far infrared radiation instrument of adjustable irradiation area,Main is that the two sides of the main irradiation unit of what one are connected separately with a secondary irradiation unit; Wherein the opposite two sides of the main irradiation unit what or so are respectively formed with a first pivoting portion,What a side forms a second pivoting portion to second mate's irradiation unit respectively again,And the first pivoting portion of the two sides of main irradiation unit constitutes coaxial pivot joint with the second pivoting portion of secondary irradiation unit respectively,It is connect so that second mate's irradiation unit is pivotable with main irradiation unit,To constitute the illuminator of multi-section type; Therefore,The utility model mainly provides user and irradiates part (such as arm),Through the secondary irradiation unit of pivot to provide different direction of illuminations,So that its irradiation area can have bigger adjustment elasticity,To reinforce improving the blood circulation of part.本新型係指一種可調整照射區域的遠紅外線照射儀,主要係於一主照射裝置的兩側分別連接有一副照射裝置;其中該主照射裝置於左右相對的兩側邊分別形成有一第一樞接部,二副照射裝置又分別於一側邊形成一第二樞接部,並且主照射裝置之兩側的第一樞接部分別與副照射裝置的第二樞接部構成同軸樞接,使得二副照射裝置可樞轉的與主照射裝置連接,以構成多節式的照射器;因此,本新型主要提供使用者照射局部(如手臂),透過樞轉副照射裝置以提供不同的照射方向,使得其照射區域可有更大的調整彈性,以加強改善局部之血液循環。