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

This powder separator is provided with an electrification means 12 for electrifying powder p, a conveying means 13 for conveying the electrified powder along a flow passage, and an electric field applying means 14 for applying an electric field of the direction perpendicular to the conveying direction of the electrified powder, and it electrostatically separates this electrified powder according to specific electric charge (Q/M) that the electrified powder has. And it is also preferably provided with a moving valve 15 for guiding the electrified powder having the desired specific electric charge to a prescribed recovery area. In this powder separating method, electrified powder obtained by electrifying powder is conveyed along a segmented flow passage and electric force from the electric field applied in the direction perpendicular to the conveying direction thereof is applied to the electrified powder, thereby the electrified powder is electrostatically separated according to the specific electric charge (Q/M) that the electrified powder has.