To provide a magnetic grinding machine which can eliminate grinding irregularities caused by a dead zone in polarity, and grind a work of the size larger than the predetermined value.

A magnet disk 1 and a motor 2 for rotation are supported by a base panel 3, a pinion 9 is rotated separately by a motor 4 for oscillation, the base panel 3 is oscillated in the longitudinal direction or the right-to-left direction by implementing the relative motion with respect to a rack 7 engaged with the pinion 9, a rail is provided on a frame, and a slider provided on a lower end of the base panel slides across the rail.