To provide a rolling bearing that can restrain abnormal vibrations and load torque variations, a bearing device having the rolling bearing, and an information recording/reproducing device having the bearing device.

The rolling bearings 22A, 22B include inner rings 30A, 30B and outer rings 31A, 31B which are coaxially arranged, a plurality of rolling bodies 32A, 32B rotatably retained between the rolling surfaces 40A, 40B of the inner rings and the rolling surfaces 41A, 41B of the outer rings, and circular shield plates 33A, 33B which have outer peripheral parts fit to the outer rings and close circular spaces 34A, 34B formed between the outer rings and the inner rings. On at least one of the outer peripheral surface and rolling surface of the outer ring, a notch part 45 is so formed as to extend in the entire perimeter of each outer ring, and cut surfaces 46, 47 for forming the notch part are formed by being cut from one surface between the pressing points 62A, 62B wherein an outer peripheral part of the shield plate radially pushes the outer ring to the outside and the contact points 61A, 61B wherein the rolling bodies come into contact with the rolling surface of the outer ring.