The invention relates to a device for disinfecting of gase and/or liquids, comprising a tube of UV-transparent glass (10) having a hollow interior space (40) and a tube wall with a tube inside wall (70) and a tube outside wall (60), as well as at least one UV-light source (20a, 20b, 20c...), whereby the UV-transparent glass tube (10) has an indentation (25a, 25b, 25c...) extending into the interior space (40) on at least one location and in the at least one indentation (25a, 25b, 25c...) at least one UV-light source (20a, 20b, 20c...) is arranged. The geometry according to the invention causes the UV-light sources to be closer to the medium to be disinfected, so that a large portion of the UV-light reaches the interior space (40) on a direct path through the glass, thus allowing for a low-loss transfer of the UV-light. The result is better exploitation of the UV-radiation. Thanks to the geometry provided by the invention a more homogeneous light distribution in the interior space of the tube is furthermore achieved, thereby increasing the disinfection efficiency. Moreover, a highly compact system is made available by the arrangement according to the invention.本發明涉及一種氣體及/或液體殺菌裝置,具有一根對紫外線透明的玻璃管(10)及至少一個紫外線光源(20a,20b,20c...),其中玻璃管(10)具有一中空的內部(40),且其管壁是由管內壁(70)及管外壁(70)構成,其中對紫外線透明的玻璃管(10)在至少一個位置有一個向內陷入內部(40)的凹穴(25a,25b,25c...),同時在該至少一個凹穴(25a,25b,25c...)內設有至少一個紫外線光源(20a,20b,20c...)。本發明的造型及配置方式使紫外線光源非常靠近待殺菌的介質,以使大部分的紫外線能夠以直接路徑穿過玻璃進入內部(40),因此紫外線的損耗很低。這樣就可以更加充分的利用紫外線。此外,本發明的造型及配置方式還可以在管子內部達到均勻的光線分佈,因而提高殺菌效果。本發明的配置方式還可以提高系統的結構緊密性。10‧‧‧玻璃管20a、20b、20c‧‧‧紫外線光源25a、25b、25c‧‧‧凹穴30‧‧‧反射器40‧‧‧管子內部60‧‧‧管外壁70‧‧‧管內壁