To prevent the generation of leakage of the grease from a shaft pass-through part of an inside oil thrower, and to eliminate the lowering of the insulating performance of a rotary electric equipment and the rectifying failure thereof.

This bearing device is provided with a bearing 3 for supporting a shaft 9 of a rotary electric equipment, an inside oil thrower 1 and an outside oil thrower 7 provided in a rotary equipment side of the bearing 3 and an opposite side thereof so as to pass through the shaft 9, a hollow cylindrical slinger 10 provided between the bearing 3 of the shaft 9 and the inside oil thrower 1, and a flange 11 provided in the bearing 3 side of the inside oil thrower 1 along the peripheral surface of the slinger 10. This flange 11 is arranged so as to be overlapped with the peripheral surface of the slinger 10 with a clearance in relation to the peripheral surface of the slinger 10 in the radial direction of the shaft. Leakage of the grease from a shaft pass-through part 12 of the inside oil thrower 1 is thereby prevented.