Dental floss holding and feeding device that has a winding (2) made of dental floss filament (13) that comprises a central opening； a shaft (15) with an axis normal to the plane of the winding (2) and fitted in the opening； a base plate (11) supporting a side of the winding (2) and a closed space in the body (10) for locating the winding (2), furthermore a lead out opening (3) for an end portion of the winding (2)； and a cutter (8) arranged across the path of the lead out filament (4) to cut the filament when being suddenly pulled, wherein the winding (2) has a flat, narrow shape compared to the size of its own diameter, the body (10) has a larger plane constituted by the base plate (11)； the body (10) has a narrow rear edge (14) to which a cover (20) is attached that can be folded in a position parallel to the base plate (11) and opened by unfolding； an envelope (13) is attached to the base plate (11) that defines the closed inner space, the envelope (13) has an upper surface that is substantially parallel to the base plate (11), the height of the envelope (13) is substantially equal to the width of the rear edge (14), and the cover (20) in folded position covers the upper surface of the envelope (13), and behind the front edge of the base plate (11) a manipulation field (5) is provided that extends between the lead out opening (3) and the cutter (8), the manipulation field (5) enables holding the previously cut end of the filament (4) by hand, and it is defined by the shape of the envelope (13), and the cutter (8) is fixed to the base plate (11).
