PURPOSE: To obtain an electric blower quiet with less vibration by constituting a bearing device of pneumatic bearing using a permanent magnet for a bearing of a rotor levitated by magnetic force.

CONSTITUTION: A small ball bearing 36 is forced to be press fitted to a load side shaft 28 in a bearing part of a rotor 23, and cylindrical permanent magnet 37 of section in squared shape with one end open is secured to the outside of the ball bearing 36. A permanent magnet 38 is secured to a load side bracket 22, holding an air space from the permanent magnet 37 coating its outside. The permanent magnet 37 is magnetized for its inside in polarity N and outside in polarity S in both thrust and radial directions, while the permanent magnet 38 is magnetized for its inside in polarity S and outside in polarity N reversely to the permanent magnet 37. While circular opening parts 37a, 38a are provided in a central part of the magnet. Also a bearing part 35 opposite to the load side is constituted similarly to the load side bearing part 34.