A portable smoke dispersing device includes a cylindrical body containing a motor fixed with a fan for producing a strong wind, and a jet nozzle for spraying minute water drops mixed in the strong wind to flow out of the body into dense smoke in a fire site so as to disperse dense smoke out of a room, a house, etc. Further, a power source and a water tank are attached with the body, and an illuminating lamp and laser sight are also provided for searching into dense smoke for people trapped in a fire to lead them to escape out.