PROBLEM TO BE SOLVED: To provide an interdental brush that hardly causes pain when coming into contact with the gum and the like, and that makes high cleaning ability and interdental insertion property compatible.SOLUTION: The interdental brush 1 made of synthetic resin includes a grip part 2 and a brush part 3 provided at the tip end of the grip part 2. The brush part 3 comprises a shaft material 4 that extends from the tip end of the grip part 2 and a plurality of projection pieces that protrude from the shaft material 4. Also, the brush part 3 includes a region (A)6 that is formed near the rear end and a region (B)7 that is formed on the tip end side from the region (A)6. In the region (A)6, first projection pieces 5a are in a row in the shaft direction while, in the region (B)7, only third projection pieces 5c and fourth projection pieces 5d which have a height lower than the first projection pieces 5a are in a row in the shaft direction.SELECTED DRAWING: Figure 1COPYRIGHT: (C)2016,JPO&INPIT
