PROBLEM TO BE SOLVED: To provide an aircraft water supply system capable of improving the quality of water supplied by an aircraft. An aircraft water supply system (1) mounted on an aircraft and supplying water to a plurality of water supply ports (2) in the aircraft, the tank (3) storing water, and extending from the tank (3), A water supply pipe 4 which is branched and connected to each of the plurality of water supply ports 2 and supplies water from the tank 3 to the plurality of water supply ports 2, and at least a water supply port near the water supply port 2 for drinking. An ultraviolet light sterilizer 8 which is provided in the pipe 4 for use, has a light emitting diode for irradiating ultraviolet light, and irradiates the water supplied to the water supply port 2 with the ultraviolet light from the light emitting diode to sterilize it. It was [Selection diagram] Figure 1【課題】航空機で供給される水のクオリティーを向上することが可能な航空機用水供給システムを提供する。【解決手段】航空機に搭載され、当該航空機内の複数の水供給口２へと水を供給する航空機用水供給システム１であって、水を貯留するタンク３と、タンク３から延出されると共に、分岐して複数の水供給口２のそれぞれに接続され、タンク３からの水を複数の水供給口２に供給する給水用配管４と、少なくとも飲用に供される水供給口２の近傍の給水用配管４に設けられると共に、紫外光を照射する発光ダイオードを有し、発光ダイオードからの紫外光を水供給口２に供給される水に照射して殺菌する紫外光殺菌装置８と、を備えた。【選択図】図１
