The application discloses a far-infrared illumination device which is suitable for mounting on a wearable device. The far-infrared illumination device includes a main body, two fins, a circuit module, a far-infrared module and a power module. The main body includes a first housing assembling with a second housing, and a sliding component. There is an opening disposed at the second housing. The sliding component is disposed at the side of the second housing adjacent to the wearable device. The two fins are connected to the two opposite sides of the main body, respectively. One end of the fin is connected to the first housing and/or the second housing. The circuit module, the far-infrared module and the power module are disposed in the main body. The far-infrared module is disposed corresponding to the opening. The far-infrared module is electrically connected to the circuit module. The power module is electrically connected to the circuit module and the far-infrared module.本新型揭露一種遠紅外線照射裝置，用以搭配穿戴裝置使用。遠紅外線照射裝置包括本體、二翼片、電路模組、遠紅外線模組及電源模組。本體包括第一殼體、第二殼體及滑動件。第二殼體與第一殼體對應設置並設有開口。滑動件設置於第二殼體鄰近穿戴裝置的一側。二翼片連接本體的相對兩側邊，且各翼片的一端連接第一殼體及/或第二殼體。電路模組設置於本體內。遠紅外線模組對應開口設置於本體內並與電路模組電性連接。電源模組設置於本體內並與電路模組及遠紅外線模組電性連接。
