Provided is a compact ultraviolet irradiation apparatus using ultraviolet light-emitting devices such as ultraviolet LEDs that can irradiate high intensity ultraviolet rays. This ultraviolet irradiation apparatus including a light source for emitting ultraviolet rays; and a light condenser for condensing the ultraviolet rays emitted from the light source, the light source is a modularized rod-like light source (110) where a plurality of ultraviolet light-emitting devices is disposed on a side surface of a cylindrical or polygonal columnar base such that a light axis of each ultraviolet light-emitting device passes through a center axis of the cylindrical or polygonal columnar base to emit the ultraviolet rays radially to the center axis, the rod-like light source is disposed on a focal axis (121) of a long elliptical reflective mirror (120) to condense ultraviolet rays radially emitted from the rod-like light source, and the condensed ultraviolet rays are irradiated.