The present invention is an ultraviolet detecting lamp for detecting a fluorescent substance, which comprises an ultraviolet light emitting unit and a power supply line. The power cord includes a first end and a second end. The first end is electrically connected to the ultraviolet light emitting unit and the second end is provided with a connector, and the connector is a USB interface or a Lightning interface. By connecting the power cord connector to the external power supply and supplying power to the ultraviolet light-emitting unit, the creation of the power cord is not problematic due to insufficient battery power, and the waste battery is not generated to cause environmental problems; In addition, USB sockets are becoming more and more popular and available everywhere, making this creation more usable everywhere. Moreover, this creation can also be configured with Lightning interface connectors to connect to other systems' smart phones, making the specifications more diverse.本創作係檢驗螢光物質用的紫外線檢測燈,其包含一紫外線發光單元及一電源線。電源線包含有一第一端及一第二端,第一端電連接於紫外線發光單元且第二端設有一接頭,且接頭為USB介面或Lightning介面。藉由使電源線的接頭連接於外部供電源並向紫外線發光單元供電,如此一來本創作就不會有因電池電力不足而無法使用的問題,並且也不會產生廢棄電池而造成環保問題;此外,USB插座日漸普及且隨處可見,使本創作更可以隨處可用;並且,本創作也可以配置Lightning介面的接頭來連接於其他系統的智慧型手機,使得規格上的對應更加多元化。