A dental floss holder for holding only three exposed teeth-cleaning segments of a dental floss, the dental floss holder comprising
- a holding portion and a head portion, wherein said head portion is disposed on an upper end of said holding portion and bends towards an obliquely upward direction from said holding portion, the holding portion defining a longitudinal axis extending in a longitudinal direction;
- said head portion being provided with a first arm portion and a second arm portion that symmetrically extend from a lower end of said head portion to both sides, and a third arm portion and a fourth arm portion that symmetrically extend from an upper end of the said head portion to both sides, each arm portion has a tail end;
- a first space for tensioning a first exposed segment of the dental floss being formed between the tail ends of the first arm portion and said third arm portion, a second space for tensioning a second exposed segment of the dental floss being formed between the tail ends of said third arm portion and said fourth arm portion, a third space for tensioning a third exposed segment of the dental floss being formed between the tail ends of said fourth arm portion and said second aim portion, said first exposed segment and said third exposed. segment of the dental floss are parallel to the longitudinal direction of the holding portion, said second exposed segment of the dental floss is perpendicular to the longitudinal direction of said holding portion, wherein the first, second, and third exposed segments are the only three exposed segments of the dental floss for cleaning teeth;
- four clamping grooves for fixing the dental floss being respectively disposed at the tail ends of said first arm portion, said second arm portion, said third aim portion and said fourtharm portion, wherein the four clamping grooves and the first, second and third exposedsegments of the dental floss are all lying on a plane parallel to and offset from the longitudinal axis of the holding portion;
- said head portion being provided with a threading hole for the dental floss to penetrate through, said threading hole being formed transversely through said head portion between said first arm portion and said second ann portion;
- two winding grooves being formed on the lower end of said head portion at two opposite sides thereof respectively, said two winding grooves lying on a plane perpendicular to the longitudinal axis so that the dental floss is wound around the lower end of the head portion;
- an indicating portion for indicating winding direction of said dental floss being disposed on said first arm portion, the indicating portion being a raised or recessed dot;
- a plurality of non-slip projections being formed on a surface of said holding portion, and
- a raised pressing portion being disposed on said holding portion adjacent to said head portion.