PROBLEM TO BE SOLVED: To efficiently spread ions over in the whole room.SOLUTION: There is provided an ion generation device capable of spreading ions over in the whole room since an outlet 17 is provided to an outer periphery for outward blowing and a shortcut of ions by a suction flow is reduced by employing configurations such that a suction port 16 and the outlet 17 are formed concentrically with respect to the shape of a grill 18, the outlet 17 is provided on the outer peripheral side, and the outlet 17 is shaped so as to have an acute angle between the outer peripheral side of the grill 18 and a ceiling surface.
