A hot air fan is started. The disclosed hot air fan includes an outer case； A burner member that generates heat by using external energy to form hot air； A first chamber member through which hot air formed in the burner member flows； A first inner partition wall member communicating with the first chamber member to allow hot air flowing through the first chamber member to flow； A first intermediate partition wall member enclosing the first inner partition wall member such that hot air introduced into the first inner partition wall member flows from the first chamber member around the first inner partition wall member； A second inner partition wall member communicating with the first inner partition wall member to allow hot air flowing around the first inner partition wall member to flow； A second intermediate partition wall member surrounding the second inner partition wall member so that hot air introduced into the second inner partition wall member flows in the vicinity of the second inner partition wall member； A second chamber member in which hot air flowing around the second inner partition wall member flows and is discharged to the outside； A first air blowing member for introducing air to be heated into the outer case and blowing air toward the first chamber member and the first inner side wall member； And a second air blowing member for introducing air to be heated into the outer case and blowing air toward the second chamber member and the second inner partition wall member separately from the first air blowing member, The heating air introduced into the outer case by the second air blowing member is supplied to the first chamber member, the first inner partition wall member, the first intermediate partition wall member, the second chamber member, , The heat exchanges with at least one of the second intermediate partition wall members and flows into the outer case and changes into warm air, and the hot air is discharged to the outside of the outer case and
