[Problem] To provide an interdental brush configured so that the brush section can be satisfactorily inserted between grinding teeth, the breakage of the base of a core material which is exposed from a neck section is effectively prevented, the interdental brush can be stably operated during interdental cleaning, pain caused by the contact between the front end of the handle section and the gums can be prevented, and the interdental brush can be manufactured at low cost. [Solution] An interdental brush (1) has a brush section (3) formed by planting filaments in a core material (2) constructed from a wire, and also has a handle section (10) as the hand grip. The base of the core material (2) is held at the front end of the handle section (10), and the brush section (3) is supported by the handle section (10). The handle section (10) is provided with a handle body (11) and a neck section (12) which is provided at the front end of the handle body (11). A neck base material (22) which is flat, consists of a synthetic resin, and can be bent is provided to the neck section (12). The base of the core material (2) is embedded in the neck base material (22).本發明在於提供一種刷部對臼齒間具有良好插入性,並可以有效地防止從頸部所露出之芯材基部的斷裂,而在進行齒間清潔時能夠安定地操作,並能夠防止因手持部的前端部與齒肉的接觸所造成的疼痛之可以較便宜製作的齒間刷。本發明的齒間刷,係具有:在由線材所構成的芯材(2)上植設纖毛的刷部(3)、以及作為抓持柄的手持部(10),並將芯材(2)的基部保持在手持部(10)的前端部,而使刷部(3)由手持部(10)所支撐而成的齒間刷(1),其中手持部(10),係具備:手持本體(11)、以及設於手持本體(11)之前端部的頸部(12),於頸部(12)設有由合成樹脂所構成之能夠折彎之扁平的頸基材(22),並將芯材(2)的基部埋設於頸基材(22)。1‧‧‧齒間刷2‧‧‧芯材2a‧‧‧定錨部3‧‧‧刷部4‧‧‧植毛部10‧‧‧手持部11‧‧‧手持本體12‧‧‧頸部13‧‧‧插入限制部20‧‧‧手持基材21‧‧‧手持本體基材21b‧‧‧露出面21c‧‧‧定位孔22‧‧‧頸基材22a‧‧‧凹槽23‧‧‧膨出部23a‧‧‧頂面30‧‧‧覆蓋部31‧‧‧止滑部32‧‧‧連接部33‧‧‧緩衝部
