A hollow fiber is provided. The fiber has a tube wall containing infrared ray powder being capable of irradiating infrared ray. A hollow fiber membrane made from plural of the hollow fibers is also provided.本案係關於一種中空纖維,包含一管壁,該管壁含有遠紅外線粉末,該粉末能釋放遠紅外線。本案亦提供由複數束該中空纖維所組成的中空纖維膜。30‧‧‧中空纖維31‧‧‧管壁32‧‧‧中空部33‧‧‧複合物34‧‧‧通道