the present invention relates to a zahnseidenhalter with a basic body (2), two arms (4) train, between which at least one zahnseidenfaden (6) is anxious and the zahnstocherelement (12) by a abragt, in his schutzstellung and protective element (14) umg that is, in a position for use verschwenkbar isin which the zahnstocherelement (12) of the body (2) abragt. to improve the performance of the present invention is a arretierungselement (18) is proposed, which the protective element (14) in the position for use.