The utility model relates to a dental floss with a handle, which is such an apparatus that can be used to removing the extraneous matter from the teeth. It is characterized in that the front of extension rod, which is in the front of the handle, is provided with a fork. The head of the screw on the outside of the extension rod is provided with a locknut. The lumen of the handle is provided with a yarn clew, the protruding end of which is through along in the lumen of the handle, and is through the middle hole of screw's head, then extends to the front of the fork along the slot on the extension rod and turns into the crack in the front, then is blocked in landscape orientation in the thread-nipping groove arranged at the front of the other side, finally is coiled on the head of the screw and fixed by the locknut. When the production is used, the extraneous matter in the slots of the teeth at any corner of the upside and the downside, the left and the right of the gum could be removed by changing the direction of the fork and swinging the body of the handle.