Provided is a dental floss holder which is easy to use and has low harm. [Means for solving the problems] A dental floss 2 for cleaning between teeth, a tension portion 3 for stretching both ends of the dental floss, A grip portion 4 with which the stretching portion 3 is engaged, and a protruding support portion 5 which is engaged with at least one of the stretching portion and the grip portion, and one end of the stretching portion 3 A dental floss in which a portion near the distal end of the support portion 5 at the tip of the stretching portion 3 has a substantially minimum radius of 1 mm or more in all directions passing through the distal end of the portion near the distal end. Holder 1. [Selection diagram] FIG.
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