An ultraviolet disinfection device including an ultraviolet disinfection unit, the ultraviolet disinfection unit including: a housing having an opening an ultraviolet ray transmissive window having an inner face and an outer face, and arranged to cover up the opening of the housing with the inner face directed toward the inside of the housing a light source including one or more ultraviolet light emitting diode and emitting an ultraviolet ray as a band-like beam and a scanning means irradiating the ultraviolet ray from the light source while changing an incident position on the window in a direction crossing a width direction of the band-like beam, such that the whole area of the inner face of the window can be irradiated with the ultraviolet ray from the light source, wherein the ultraviolet ray is irradiated to a body to be disinfected arranged facing the outer face of the window.一種紫外線殺菌裝置,其中具備紫外線殺菌單元,該紫外線殺菌單元,具有:框體,具有開口部;紫外線透過窗,是紫外線可透過且具有內側面以及與該內側面相反側的外側面,以封閉框體的開口部的方式將內側面朝框體的內部配置;光源,具有一個以上的紫外發光二極體且將紫外線作為帶狀的光束射出;掃描機構,是藉由一邊將來自於光源的紫外線入射在紫外線透過窗的位置朝與帶狀光束的寬度方向交叉的方向錯開一邊照射來自於光源的紫外線,可以將來自於光源的紫外線從框體的內部遍及紫外線透過窗的內側面的整面進行照射,將紫外線照射在配置成與紫外線透過窗的外側面相對向的殺菌對象上進行殺菌。10‧‧‧紫外線殺菌裝置(第一紫外線殺菌單元)11‧‧‧框體11a、11b、11c、11d‧‧‧側壁11e‧‧‧底面12‧‧‧紫外線透過窗13‧‧‧紫外線射出窗14‧‧‧鏡15‧‧‧驅動裝置16‧‧‧收納部17‧‧‧開關19‧‧‧光軸
