An interdental brush device comprising an interdental brush including a working part and a connector； a delivery component including a guide head, a sliding mechanism including a sliding block and an interdental brush connecting mechanism, and a housing； the interdental brush comprises a working part with fiber or a protrusion and a connector； the interdental brush is positioned within a bended tube, and the connector of the interdental brush is detachably coupled to the interdental brush connecting mechanism such that lateral movement of the sliding mechanism drives the working part of the interdental brush to slide within the bended tube, the protrusion is made of elastic polymer material, and the connector and the protrusion are formed into a whole； and the sliding mechanism is configured to make the working part of the interdental brush extend from the outlet of the bended tube at the end of the guide head.
