PURPOSE: To provide an ion generation device for preventing charging suitable in terms of preventing electrostatic, in a simple structure.

CONSTITUTION: An ion generator 4 is arranged directing to the outside, on the inside of a blowout port 3 of am air blowing duct 2 that carries out cooling or warming, and a conical radiation part 7 is arranged in line on the surface of a square-polar box body 6 on which a lead 5 is arranged for the ion generator 4. A humidification device provided with a filter 46 for passing water is arranged on the passage of air passing through the ion generator 4.