A kind of ultraviolet light drainage hole sterilizing unit includes: an ontology and a ultraviolet light mould group. Wherein, it can produce a ultraviolet light when the ultraviolet light mould group is opened, with drainage hole is sterilized one of thereon to covering what. Therefore, the effect of the utility model, can carry out most reflections in the what accommodating space in what ultraviolet light to be sterilized, effectively reach the purpose that drainage hole sterilization is carried out using ultraviolet light, furthermore, the utility model has portable characteristic, therefore what bathroom or kitchen etc. have in the environment of drainage hole in use, can carry out drainage hole sterilization under conditions of need not provide alternating current.一種紫外線排水孔殺菌裝置，包含：一本體及一紫外線模組。其中，當該紫外線模組開啟時可產生一紫外光，以對覆蓋於其上之一排水孔進行殺菌。因此，本新型之功效在於紫外光可於該容置空間中進行多數次的反射以進行殺菌，有效達到利用紫外線進行排水孔殺菌之目的，此外，本新型具有可攜式之特色，因此於浴室或是廚房等具有排水孔之環境中使用時，可以在無須提供市電的條件下進行排水孔殺菌。
