An LED unit includes: a plurality of LED modules each having an LED chip for generating ultraviolet ray provided in a package which has an opening formed on one surface and a lens formed to cover the opening of the package; a substrate-shaped base block where the LED modules are mounted in a first direction; and a heat radiation member where a plurality of the base blocks is provided in a second direction perpendicular to the first direction. The heat radiation member has a plurality of inclined surfaces where each of the base blocks is disposed. Further, one inclined surface and the other inclined surface of the heat radiation member are inclined to face each other in the second direction.