PROBLEM TO BE SOLVED: To suppress a reduction in ultraviolet light irradiation efficiency.SOLUTION: A fluid sterilization apparatus of an embodiment includes: a light source including a substrate on which an LED that emits ultraviolet light is mounted a cylindrical flow passage member of which at least part is formed of a material with permeability to ultraviolet light, and which is irradiated with ultraviolet light emitted by the LED and a reflective member which has a first reflective surface that is disposed to form a gap between the first reflective surface and each of the LED and the flow passage member, and which reflects ultraviolet light that has passed through the gap to the flow passage member.SELECTED DRAWING: Figure 3COPYRIGHT: (C)2017,JPO&INPIT【課題】紫外線照射効率の低下を抑制する。【解決手段】実施形態の流体殺菌装置は、紫外線を発するLEDが実装された基板を有する光源と、少なくとも一部が紫外線透過性を有する材料によって形成され、LEDが発する紫外線が照射される筒状の流路部材と、LEDと流路部材との間に互いに間隙をあけて設けられる第1の反射面を有し、間隙を通った紫外線を流路部材へ反射する反射部材と、を備える。【選択図】図3
