PROBLEM TO BE SOLVED: To provide an interdental cleaning tool in which the interdental insertability and the gingival massage force are balanced in a region where the diameter of a shaft portion is relatively large. An interdental cleaning tool includes a base portion having a base portion and a shaft portion extending from the base portion, and a coating portion that covers the shaft portion at least 16 mm from the distal end to the base end of the shaft portion. And a soft portion 20 having a plurality of protrusions 22 protruding from the covering portion 21, and in the region of the covering portion 21 in the range of 15 mm to 20 mm from the distal end to the base end of the shaft portion 21, the covering portion The area L of the bottom surface of the projection 22 is set to 2 to 5 by the ratio L/M of the area M of the bottom surface of the projection 22 that is the boundary with the projection 21 and the length L of the projection 22 from the bottom surface of the projection 22. M is set to 0.9 cm2 to 0.15 cm2 for a ratio L/M of 2 to 5. [Selection diagram] Fig. 3【課題】軸部の直径が比較的大きい領域において歯間への挿入性と歯肉へのマッサージ力とのバランスがとれた歯間清掃具を提供する。【解決手段】歯間清掃具は、基部と、基部から延在する軸部と、を有する基材部と、軸部の先端から基端に向かって少なくとも１６ｍｍにわたって軸部を被覆する被覆部２１と、被覆部２１から突き出る複数の突起部２２と、を有する軟質部２０と、を備え、軸部２１の先端から基端に向かって１５ｍｍ～２０ｍｍの範囲の被覆部２１の領域において、被覆部２１との境界となる突起部２２の底面の面積Ｍと突起部２２の底面からの突起部２２の長さＬとの比Ｌ／Ｍが２～５に設定され、突起部２２の底面の面積Ｍは、比Ｌ／Ｍが２～５であることに対して０．９ｃｍ２～０．１５ｃｍ２に設定される。【選択図】図３
