To provide a rolling bearing running-in device and a manufacturing method, allowing clarifying direct conditions for increasing the rolling lifetime under a lean lubrication condition and manufacturing a rolling bearing satisfying the condition.

The rolling bearing includes an inner ring 1, an outer ring 2, and a plurality of rolling elements 3 interposed between the raceway surfaces of the inner and outer rings 1, 2. A manufacturing device is a type to perform running-in before using the rolling bearing, for rolling by running-in under the lean lubrication condition in which an oil film parameter Λ is 0.6 or smaller.