The present invention relates to a hot air blower. The hot air blower blows air containing supersaturated steam in order to increase the indoor temperature or dry an object. The hot air blower comprises: a hollow blower pipe having a space unit formed inside a wall and having a discharge groove formed along the circumference of the inner circumferential surface; a blower installed on one side of the blower pipe and transferring high-pressure air to the space unit through a duct; a steam generator installed on one side of the duct and generating the steam by heating water; and a first supersaturated generator installed between the steam generator and the duct and heating the steam generated in the steam generator to supply the supersaturated steam to the duct.
