A use of a rolling bearing, the rolling bearing comprising: an inner ring; an outer ring; and a rolling element, wherein: retained austenite amounts γ RAB of surface layer parts of the inner ring and the outer ring is greater than 0% and less than or equal to 30%, by volume; the rolling element is made of a raw material including alloy steel in which an Si content is 0.3 to 2.2%, both inclusive, by weight and an Mn content is 0.3 to 2.0%, both inclusive, by weight and also a content ratio, Si/Mn, of Si to Mn is 5 or less by mass; the rolling element has a predetermined shape and has been thermally treated including carbonitriding or nitriding; Si•Mn nitride including nitride of silicon Si and nitride of manganese Mn is present in a rolling surface of the rolling element in a range of 1.0 to 20.0%, both inclusive, by area; an N content of a surface layer part of the rolling surface is 0.2 to 2.0%, both inclusive, by weight; and a retained austenite amount γ RC of the surface layer part of the rolling surface is greater than 0% and less than or equal to 30%, by volume and the following formula is satisfied γ RAB − 15 ≤ γ RC ≤ γ RAB + 15 characterized in that the rolling bearing is lubricated with lubricating oil whose kinematic viscosity at 40°C is 1 to 5×10 -5 m 2 /s or grease whose kinematic viscosity of base oil at 40°C is 1 to 5×10 -5 m 2 /s, and the rolling bearing is on rotation condition that a PV value of a rolling contact between a raceway surface of the inner ring or the outer ring and the rolling surface is 100 MPa•m/s or more, a slip speed V of the rolling contact is 0.080 m/s or more, and a Dmn value is 800000 mm•min -1 or more, wherein the PV value is defined by the product of a surface pressure of the rolling contact and the slip speed V, and the Dmn value is defined by the product of an average dimension of an inside diameter and an outside diameter of the bearing multiplied by a rotational speed. retained austenite amounts γ RAB of surface layer parts of the inner ring and the outer ring is greater than 0% and less than or equal to 30%, by volume; the rolling element is made of a raw material including alloy steel in which an Si content is 0.3 to 2.2%, both inclusive, by weight and an Mn content is 0.3 to 2.0%, both inclusive, by weight and also a content ratio, Si/Mn, of Si to Mn is 5 or less by mass; the rolling element has a predetermined shape and has been thermally treated including carbonitriding or nitriding; Si•Mn nitride including nitride of silicon Si and nitride of manganese Mn is present in a rolling surface of the rolling element in a range of 1.0 to 20.0%, both inclusive, by area; an N content of a surface layer part of the rolling surface is 0.2 to 2.0%, both inclusive, by weight; and a retained austenite amount γ RC of the surface layer part of the rolling surface is greater than 0% and less than or equal to 30%, by volume and the following formula is satisfied γ RAB − 15 ≤ γ RC ≤ γ RAB + 15 characterized in that the rolling bearing is lubricated with lubricating oil whose kinematic viscosity at 40°C is 1 to 5×10 -5 m 2 /s or grease whose kinematic viscosity of base oil at 40°C is 1 to 5×10 -5 m 2 /s, and the rolling bearing is on rotation condition that a PV value of a rolling contact between a raceway surface of the inner ring or the outer ring and the rolling surface is 100 MPa•m/s or more, a slip speed V of the rolling contact is 0.080 m/s or more, and a Dmn value is 800000 mm•min -1 or more, wherein the PV value is defined by the product of a surface pressure of the rolling contact and the slip speed V, and the Dmn value is defined by the product of an average dimension of an inside diameter and an outside diameter of the bearing multiplied by a rotational speed. <EOS>