To provide an interdental cleaning tool which improves insertion properties into an interdental portion and cleaning properties of lateral faces of tooth and the interdental portions.SOLUTION: An interdental cleaning tool includes a base part having a shaft part (20) and a cleaning part. The cleaning part has a cleaning part body and a brush part. The cleaning part body includes a tip end covering part (42a) and a base end covering part (42c). The brush part includes a plurality of tip end brushes and a plurality of base end brushes. A tip end ratio that is a ratio of a sum total (A1) of areas of tip end connection parts that are connection parts between the tip end brush and the tip end covering part (42a) in the respective tip end brushes to an area (A2) of a region other than the tip end connection parts in a peripheral surface of the tip end covering part (42a) is smaller than a base end ratio which is a ratio of a sum total (C1) of areas of base end connection parts that are connection parts between the base end brush and the base end covering part (42c) in the respective base end brushes to an area (C2) of a region other than the base end connection parts in a peripheral surface of the base end covering part (42c).SELECTED DRAWING: Figure 2【課題】歯間への挿入性を高くしつつ、歯の側面及び歯間の清掃性を高めることが可能な歯間清掃具を提供すること。【解決手段】軸部（２０）を含む基部と、清掃部と、を備え、清掃部は、清掃部本体とブラシ部とを有し、清掃部本体は、先端被覆部（４２ａ）と基端被覆部（４２ｃ）とを含み、ブラシ部は、複数の先端ブラシと複数の基端ブラシとを含み、各先端ブラシのうち当該先端ブラシと先端被覆部（４２ａ）との接続部である先端接続部の面積の総和（Ａ１）の、先端被覆部（４２ａ）の外周面のうち先端接続部以外の部位の面積（Ａ２）に対する割合である先端割合は、各基端ブラシのうち当該基端ブラシと基端被覆部（４２ｃ）との接続部である基端接続部の面積の総和（Ｃ１）の、基端被覆部（４２ｃ）の外周面のうち基端接続部以外の部位の面積（Ｃ２）に対する割合である基端割合よりも小さいこと。【選択図】図２
