The present invention provides an ultraviolet light emitting device capable of monitoring the light emitting state of a light emitting element, maintaining the light emitting intensity of the light emitting element, and suppressing the deterioration of components used for the light emitting element and extending the service life. To aim. The ultraviolet light emitting device (1) includes a light emitting element (131) that emits ultraviolet light, a mounting substrate (314) on which the light emitting element (131) is arranged, and a place where the ultraviolet light emitted by the light emitting element (131) is irradiated. A fluorescent glass element (22) which is disposed in a through hole (314a) formed through the mounting substrate (314) and emits fluorescence in the visible light region by excitation of ultraviolet rays.本発明は、発光素子の発光状態を監視し、発光素子の発光強度を維持しつつ、発光素子に用いられる部品の劣化を抑制し長寿命化を図ることができる紫外線発光装置を提供することを目的とする。紫外線発光装置（１）は、紫外線を発光する発光素子（１３１）と、発光素子（１３１）が配置される取付基板（３１４）と、発光素子（１３１）が発光する紫外線が照射される場所であり且つ取付基板（３１４）を貫通して形成された貫通孔（３１４ａ）に配置され紫外線の励起によって可視光域に蛍光を発する蛍光ガラス素子（２２）と、を備えている。
