The interdental brush (100) of the present invention includes: a brush head portion (12) having a length in one direction and a brush portion (11) around the axis； and a handle portion (13) along with the brush head portion (12) One end side in the direction of the central axis is connected； the brush head part (12) includes: a hard resin member, a shaft body extending in the axial direction, and a head provided at the front end of the shaft body； and a soft resin member, including Cover the outer peripheral surface of the hard resin member； the maximum diameter of the head is larger than the diameter of the front end of the shaft body.本發明的齒間刷（100）包括：刷頭部（12），於一方向上具有長度，並且環繞軸具有刷部（11）；以及手柄部（13），與刷頭部（12）的沿著中心軸的方向上的一端側連接；刷頭部（12）包含：硬質樹脂構件，具有於軸方向上延長的軸本體、及設置於軸本體的前端的頭部；以及軟質樹脂構件，包覆硬質樹脂構件的外周面；頭部的最大直徑較軸本體的前端的直徑大。
