A bearing apparatus comprising: a bearing; a lubricating oil supply unit connected to the bearing, the bearing including an outer ring having an outer ring raceway surface at an inner circumferential surface of the outer ring, an inner ring having an inner ring raceway surface at an outer circumferential surface of the inner ring, the inner ring being disposed inwardly of the outer ring such that the inner ring raceway surface faces the outer ring raceway surface, and a plurality of rolling elements in contact with the outer ring raceway surface and the inner ring raceway surface, the plurality of rolling elements being arranged side by side on an annular raceway, the lubricating oil supply unit including a retainer configured to retain lubricating oil to be supplied to inside of the bearing, a supplier (26,28,37) configured to supply the lubricating oil from the retainer to the inside of the bearing, and a power generator configured to generate power, the supplier being operated using the power generated by the power generator, the outer circumferential surface of the inner ring includes an inclination portion that becomes closer to the outer ring as the inclination portion extends toward the inner ring raceway surface from an end portion of the outer circumferential surface of the inner ring in an axial direction of the bearing, the supplier being configured to supply the lubricating oil toward the inclination wherein the supplier includes a nozzle member, wherein the nozzle member is provided with a nozzle hole, communicating with an oil discharge tube, and includes a surface portion facing the inclination portion in the inner ring of the bearing, the tip of the nozzle hole being an opening formed in the surface portion and being formed to face the inclination portion, characterized in that the nozzle member is connected to an annular housing of the lubricating oil supply unit, wherein the nozzle member has a surface connected to a housing main body of the annular housing, the surface being provided with an annular sealing groove to surround the nozzle hole, the surface being connected to a surface of housing main body facing bearing and wherein a seal member is disposed inside the sealing groove. a bearing; a lubricating oil supply unit connected to the bearing, the bearing including an outer ring having an outer ring raceway surface at an inner circumferential surface of the outer ring, an inner ring having an inner ring raceway surface at an outer circumferential surface of the inner ring, the inner ring being disposed inwardly of the outer ring such that the inner ring raceway surface faces the outer ring raceway surface, and a plurality of rolling elements in contact with the outer ring raceway surface and the inner ring raceway surface, the plurality of rolling elements being arranged side by side on an annular raceway, an outer ring having an outer ring raceway surface at an inner circumferential surface of the outer ring, an inner ring having an inner ring raceway surface at an outer circumferential surface of the inner ring, the inner ring being disposed inwardly of the outer ring such that the inner ring raceway surface faces the outer ring raceway surface, and a plurality of rolling elements in contact with the outer ring raceway surface and the inner ring raceway surface, the plurality of rolling elements being arranged side by side on an annular raceway, the lubricating oil supply unit including a retainer configured to retain lubricating oil to be supplied to inside of the bearing, a supplier (26,28,37) configured to supply the lubricating oil from the retainer to the inside of the bearing, and a power generator configured to generate power, a retainer configured to retain lubricating oil to be supplied to inside of the bearing, a supplier (26,28,37) configured to supply the lubricating oil from the retainer to the inside of the bearing, and a power generator configured to generate power, the supplier being operated using the power generated by the power generator, the outer circumferential surface of the inner ring includes an inclination portion that becomes closer to the outer ring as the inclination portion extends toward the inner ring raceway surface from an end portion of the outer circumferential surface of the inner ring in an axial direction of the bearing, the supplier being configured to supply the lubricating oil toward the inclination wherein the supplier includes a nozzle member, wherein the nozzle member is provided with a nozzle hole, communicating with an oil discharge tube, and includes a surface portion facing the inclination portion in the inner ring of the bearing, the tip of the nozzle hole being an opening formed in the surface portion and being formed to face the inclination portion, characterized in that the nozzle member is connected to an annular housing of the lubricating oil supply unit, wherein the nozzle member has a surface connected to a housing main body of the annular housing, the surface being provided with an annular sealing groove to surround the nozzle hole, the surface being connected to a surface of housing main body facing bearing and wherein a seal member is disposed inside the sealing groove.