The utility model discloses guarantee to disinfect performance and miniaturizing. The fluid sterilizing equipment of embodiment possesses tubular member, base member, reaches the light source. Tubularmember's both ends opening to make the fluid in the internal flow. The base member have holding tube form component the portion of acceping, and the 1st run through the mouth with the one end of theportion of acceping communicates. The light source always disposes with the other end of the portion of accommodating mutually to shine the ultraviolet ray to the portion of acceping. On fluid sterilizing equipment's tubular member's length direction, the fluid is separating tubular member and is flowing towards opposite orientation.本發明確保殺菌性能並進行小型化。實施形態的流體殺菌裝置具備管狀構件、基體、及光源。管狀構件的兩端開口，並使流體在內部流動。基體具有收容管狀構件的收容部、及與收容部的一端連通的第1貫穿口。光源與收容部的另一端相向來配置，並對收容部照射紫外線。在流體殺菌裝置的管狀構件的長度方向上，流體隔著管狀構件而朝相反的方向流動。
