Abstract: A fan device includes: a fan including a plurality of blades each extending in a radial direction relative to a rotation axis, the fan being configured to rotate about the rotation axis and generate an airflow; a rotor core provided outside in the radial direction of the fan; a stator core provided at a position facing the rotor core in the radial direction; a housing that forms an inner circumferential surface surrounding the fan about the rotation axis and that internally includes an accommodation space accommodating the rotor core and the stator core; and a compressor configured to compress air. The inner circumferential surface of the housing has a cylindrical surface and a nozzle surface whose diameter expands outward in the radial direction along the rotation axis in downstream in a flow direction of an airflow relative to the cylindrical surface.