PROBLEM TO BE SOLVED: To provide an interdental cleaner capable of differentiating cleaning effect on interdental spaces or lateral faces of the teeth, and use feeling during cleaning.SOLUTION: An interdental cleaner comprises: a base part comprising a shaft part (20)； and a cleaning part (40). The cleaning part (40) has a cleaning part body (50) and a brush part (60). The brush part (60) comprises a first brush group (61) and a second brush group (62), and each brush (60a) of the first brush group (61) and the second brush group (62) has a shape in which a projection dimension from the cleaning part body (50) becomes gradually large from the tip side to the base end side of the shaft part (20). A projection dimension from the cleaning part body (50) of the brush (60a) provided at a predetermined position in order from the tip side to the base end side of the shaft part (20) in each brush of the second brush group (62) is larger than a projection dimension from the cleaning part body (50) of the brush (60a) provided at the predetermined position in order from the tip side to the base end side of the shaft part (20) in each brush of the first brush group (61).SELECTED DRAWING: Figure 2COPYRIGHT: (C)2020,JPO&INPIT【課題】歯間ないし歯の側面の清掃効果や使用感を清掃中に異ならせ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（４０）とを備え、清掃部（４０）は、清掃部本体（５０）とブラシ部（６０）とを有し、ブラシ部（６０）は、第１ブラシ群（６１）と第２ブラシ群（６２）とを含み、第１ブラシ群（６１）及び第２ブラシ群（６２）の各ブラシ（６０ａ）は、軸部（２０）の先端側から基端側に向かうにしたがって次第に清掃部本体（５０）からの突出寸法が大きくなる形状を有し、第２ブラシ群（６２）の各ブラシのうち軸部（２０）の先端側から基端側に向かって所定番目に設けられたブラシ（６０ａ）の清掃部本体（５０）からの突出寸法は、第１ブラシ群（６１）の各ブラシのうち軸部（２０）の先端側から基端側に向かって前記所定番目に設けられたブラシ（６０ａ）の清掃部本体（５０）からの突出寸法よりも大きいこと。【選択図】図２
