A dental floss 2 containing a multifilament is a flat braided cord. The number of threads constituting the flat braided cord is preferably 6 to 33, and the dental floss preferably has a width of 0.5 to 4.0 mm, and a passage gap of 0.01 to 0.1 mm. The flat cord may contain a monofilament or a multifilament-connected thread together with the multifilament. Constituent threads of the braided cord are obliquely arranged and fixed, and, when the cord is moved in a length direction, the obliquely fixed constituent threads efficiently remove food residue, dental plaque, and the like between teeth. Furthermore, the flat braided cord is flat and thin, and easy to insert between teeth. Accordingly, a dental floss that can efficiently remove food residue, dental plaque, and the like between teeth is provided.
