A dental floss retainer ring is provided, having a size permitting placement on the finger. The ring defines circumferential sidewalls to form an external, annular space between the walls for receiving a winding of dental floss about the ring. One of the walls defines at least one slot extending only incompletely across the ring to facilitate the securance of a portion of dental floss as the dental floss is wound about the ring. The process of dental flossing teeth is facilitated by the use of one or a pair of such dental floss retainer rings.