To provide a powder separator and a powder separating method by which powder is separated according to specific electric charge (Q/M) that the powder has.

This powder separator is provided with: a flow passage forming member 1 for forming a flow passage of powder; a conveying means 2 for moving powder along the flow passage; an electrification giving means 3 for electrifying powder moving in the flow passage; and a magnetic field generating means 4 for acting magnetic force to the electrified powder to separate the electrified powder by magnetic force according to specific electric charge (Q/M) that the electrified powder has. And it is also preferably provided with a moving valve 6 for guiding the powder having the desired specific electric charge toward a prescribed recovery area. In this powder separating method, powder moving along the flow passage is electrified, and also magnetic force is acted on this powder, thereby this powder is separated according to the specific electric charge (Q/M) that the electrified powder has.