The disclosed ion-delivery device is provided with a main body (10), which is mounted in a ceiling wall (A) a front surface panel (2), which covers the main body (1), and at which an inlet port (3) and an outlet port (4) open a ventilation duct (12), which interconnects the inlet port (3) and the outlet port (4) a ventilation fan (11), which is disposed inside the ventilation duct (12) an ion-generating device (20), which has electrodes (25, 26) that generate ions an operating button (5), which is provided on one end of the front surface panel (2) in a horizontally movable manner and is biased in the direction of protrusion from the front surface panel (2), and which has an upwardly protruding claw (5a) a torsion spring (6), which has a locking section (6a) that protrudes outwards, said locking section (6a) being at the end extending in a V-shape from a supporting section freely attached at the opposite end of the front surface panel (2) a first engaging member (10c), which is provided to the main body (10), and which the horizontally moving claw (5a) engages and a second engaging member (18a), which is provided to the main body, has the end of the torsion spring (6) inserted therein, and engages the vicinity of the supporting section by means of the elasticity of the torsion spring (6).
