A case (4) accommodates an ion generator (1) for generating ions, a fan (2) for discharging the generated ions to the outside, and an illuminating device (3). In the case (4), an air passage (10) for guiding the generated ions to the outside is formed, and the illuminating device (3) is disposed on the outlet side of the air passage (10). The illuminating device (3) has a mounting plate (21) on which a plurality of light-emitting elements (20) are mounted, the mounting plate (21) is disposed along the periphery of the air passage (10), and a portion of the mounting plate (21) is positioned inside the air passage (10). The illuminating device (3) is cooled by using the air blown by the fan (20) for discharging the generated ions.