The invention discloses a dental floss structure which includes a handle and a floss holder connected with the handle. The floss holder has two end poles connected by a floss, wherein the floss holder has a first bending part from a joint of the handle; a second bending part can be formed on the two end poles of the floss holder; when the floss holder is taken as a central base line, the bending directions of the first and the second bending parts are different. According to the invention, the distance between the handle and the floss is increased by the first and the second bending parts so as to allow users not to be influenced by mouth corners when holding the handle of the dental floss with hands for cleaning of rear tooth gaps; in addition, a brush can be connected with inner sides of two ends of the floss holder; a cleaning part is disposed at the periphery of the brush; during tooth cleaning, scraps and residues left in tooth gaps can be removed by the dental floss together with the cleaning part.