To provide a bearing grinding tool facilitating the installation of a bearing which is a workpiece.

The bearing grinding tool 1 comprises a bearing case 4 of a two-stage annular cylinder structure provided at a head top portion of a cylindrical tool housing member 3 equipped on a rotating table 7 pivoted to a hollow rotating shaft 12, a bearing outer ring retainer 5 fixed in the bearing case after the bearing w which is the workpiece is guided into the bearing case 4, a clamp flange 14 attached with a bearing inner ring pressing member 15 pressing and fixing an inner ring wi bottom portion of the bearing w guided into the bearing case 4, a clamp flange lifting means 21 vertically moving the clamp flange, and a rotation driving means 25 rotating the rotating shaft 12 pivoting the clamp flange.