To facilitate the fabrication work of a stator column assembly and improve full and wise use of resources, as well as to prevent contact accident between a mold portion of a stator column and a rotor shaft due to the thermal inflation. A first electromagnet unit (30), a stator coil unit (20), and a second electromagnet unit (40) are engaged to and arranged in a cylindrical stator column (11) in the order stated, the first electromagnet unit (30) comprising an electromagnet (31) of a first active radial magnetic bearing and a radial displacement sensor (32) for the electromagnet (31) which are attached in a first circular holding member (30c) to be coated and molded with a resin mold (30d), the stator coil unit (20) comprising a stator coil (21a) that is attached in a circular yoke member (20c) to be coated and molded with a resin mold (20d), the second electromagnet unit (40) comprising an electromagnet (41) of a second active radial magnetic bearing and a radial displacement sensor (42) for the electromagnet (41) which are attached in a second circular holding member (40c) to be coated and molded with a resin mold (40d).