To provide a bearing applicable to a swing movement part without coming into contact with an outer ring of the bearing and a shaft even during the non-rotation of the shaft, applicable, in particular, to a support point bearing of an HDD device effectively, having high rigidity and a high damping function, and capable of reducing friction.

A plurality of magnetic poles 4 are provided on the whole periphery of a bearing clearance formation face of either of the outer ring 2 of the bearing and the shaft 3 fitted into the outer ring 2 of the bearing through a bearing clearance g. A plurality of bearings 1 are separated from each other in both of the circumferential direction and the axial direction. A magnetic fluid 5 is put in the bearing clearance g to be held by the plurality of magnetic poles 4.