Problem to be solved: to improve the uniformity of the irradiance distribution of the ultraviolet light to the fluid in the processing chamber and to provide a fluid sterilization device capable of increasing the distance of arrival of the ultraviolet light in the processing chamber.Solution: the fluid sterilization apparatus 1 comprises a cylindrical housing 2 having a processing chamber 23 inside, and an ultraviolet light emitting portion 26 for emitting ultraviolet light toward the processing chamber 23. Each of the light source devices 28 of the ultraviolet light emitting section 26 includes an LED light source 29 and a reflector 30 for reflecting ultraviolet light from the LED light source 29 and emitting it toward the processing chamber 23.Diagram【課題】処理室の流体に対する紫外光の放射照度分布の一様性改善と処理室内での紫外光の到達距離増大と図ることのできる流体殺菌装置を提供する。【解決手段】流体殺菌装置１は、内部に処理室２３を内部にもつ筒状筐体２と、処理室２３に向けて紫外光を出射する紫外光出射部２６とを備える。紫外光出射部２６の各光源装置２８は、ＬＥＤ光源２９と、ＬＥＤ光源２９からの紫外光を反射して処理室２３に向けて出射するリフレクタ３０とを有する。【選択図】図３
