The present invention relates to an interdental brush, which comprises: a brush part which includes a core part and a brush protruding from the core part； a body part to which the brush part is fixed； a cover part mounted on the body part so as to have elastic restoring force and having a through hole at an upper end thereof to allow the brush part to slide in the through hole as elastic restoration interlocking movement is vertically performed. An object of the present invention is to provide the interdental toothbrush capable of solving a problem that a safety problem may be caused by bending of the brush part while improving durability.본 발명은 심부와 상기 심부에서 돌출되는 브러쉬가 형성된 브러쉬부； 상기 브러쉬부가 고정되는 몸체부； 상기 몸체부에서 탄성복원력을 갖도록 장착되며 상단에 관통홀이 구성되어 상,하 탄성복원 연동을 함에 따라 상기 관통홀에서 상기 브러쉬부가 슬라이드 연동되도록 하는 커버부；를 포함하는 치간칫솔에 관한 것이다.
