To provide a rolling bearing with noise emission reduced.

Rolling bearings 2A and 2B are equipped with outer rings 3A and 3B set in a housing, inner rings 4A and 4B mounted on a shaft 6, and a plurality of rolling elements 5A and 5B installed between the inner and outer rings, wherein the outer rings 3A and 3B are furnished at the peripheries with a plurality of grooves 30A and 30B. In the grooves 30A and 30B, a plurality of O-rings 32A and 32B are fitted in the condition contacting with the housing, and the space bounded by these O-rings 32A and 32B and the housing is filled with a viscous fluid.