To provide a hot wind generator having blowing conditions wherein no resisting matter is present in a flow passage in an interior of a casing and which shows a good temperature distribution and can easily be manufactured and adapted to be mass-produced in a hot wind generator having a multi-blade blower and a heating body integrated with each other in a discoidal casing.

The heating body is cast around an outer peripheral circumferential part of the discoidal casing housing the multi-blade blower. When being manufactured, the casing is cast with the heating body disposed in a mold, and then the multi-blade blower is fixed in the casing so as to integrate a blower device and the heating body into a unit.