The present invention is excellent in the insertion of the between the teeth, yet to provide sufficient available interdental cleaning tool the cleaning properties in a state in which saliva is interposed. Comprises a handle substrate 11 made of A synthetic resin, and a cleaning unit 2 that the cleaning body 21 made of elastomeric an elongated shaft-shaped core portion 12 of the handle base 11 formed by exterior, a covering portion 21a that the cleaning body 21 covers the core 12, from the covering portion 21a and an interdental cleaning device 1 having a plurality of protrusions 21b for cleaning projecting outwardly, the cleaning body 21 Shore a hardness is constituted by a styrene-based thermoplastic elastomer A25~A55, the cleaning unit 2A, a dynamic friction coefficient by non with intervening water d, the coefficient of dynamic friction while interposing the water w when it, the relational expression of 0.9 d w between Ryodo friction coefficient is establishedFIELD 1【課題】歯間への挿入性に優れ、しかも唾液が介在した状態での清掃性を十分に確保可能な歯間清掃具を提供する。【解決手段】合成樹脂からなるハンドル基材11と、ハンドル基材11の細長い軸状の芯部12にエラストマからなる清掃部本体21を外装してなる清掃部2とを備え、清掃部本体21が芯部12を被覆する被覆部21aと、被覆部21aから外方へ突出する清掃用の複数の突起部21bとを有する歯間清掃具1であって、清掃部本体21をショアA硬さがA25~A55のスチレン系熱可塑性エラストマで構成し、清掃部2Aにおける、水を介在させていない状態での動摩擦係数をμd、水を介在させた状態での動摩擦係数をμwとしたときに、両動摩擦係数間に0.9×μd≦μwの関係式が成立する。【選択図】図1
