To improve separation capacity by reducing a region in which separation capacity is low (a dead space) around the central shaft of a separating bore.

In a magnetic separator in which materials to be separated are passed through a separation bore 1 to separate a specified material by the difference in magnetic force applied to particles of the materials to be separated through the gradient of a magnetic field in the bore, outside the separation bore 1, saddle shaped primary coils 2 and saddle shaped secondary coils 3 having different magnetic field generating capacity from the formers are installed, and the primary coils 2 and the secondary coils 3 are combined in a cusp state, thereby making a zero magnetic field point eccentric to the central axis of the separation bore 1.