A 3-dimentional strip for stripping a tooth is provided. Some or whole of at least one side of both sides includes a abrasive face to abrade an interdental area, an upper portion includes a predetermined thickness along a longitudinal direction, and a lower portion includes a thickness decreased toward an end of the longitudinal direction and increased toward the other end of the longitudinal direction. The thickness on the other end is greater than the thickness of the upper portion.
