A rack for supporting and systematically organizing dental clamps according to shape and size includes a support and a plurality of posts extending generally upwardly therefrom, the posts each having at least one partially circumferential slit disposed essentially perpendicular to the axis of the post, and containing a permanent magnet exposed at the inner end of the slit. In use, the bow portion of a clamp is placed in a slit, the slit serving to mechanically support the clamp on the post and the magnet serving to retain the clamp in the slit, even though the rack be jostled while being moved from one place to another, or tipped, or subjected to any other action that would tend to dislodge the clamp from the slit if not otherwise held.