A gaseous constituent supply device for supplying an air vortex ring containing a gaseous constituent includes a first chamber for holding the gaseous constituent, a compressing portion for compressing air in the first chamber, and a second chamber communicating with the first chamber through an opening. The second chamber holds the gaseous constituent therein. The air vortex ring is generated in the second chamber such that air blown from the first chamber into the second chamber through the opening takes in the gaseous constituent in the second chamber. The second chamber has an emitting outlet, through which the generated air vortex ring is emitted, and the emitting outlet is provided opposite to the opening.