A kind of interdental brush holds brush improved structure structure, with holding brush portion, for rhabodoid, one end has perforation, the axle center of brush portion is perforated and held in being mutually perpendicular to, and at least side is equipped with groove on perforating, and the setting of groove and the axis parallel of holding brush portion, and the tail end for holding brush portion is smooth closed, and the other end is extended bending neck； Gu brush part has the lock member of at least one and is arranged what and holds brush portion； And grip part, it is the long rod extended from the bending neck of rhabodoid, is available for users to gripping.一種齒間刷之持刷構造改良結構，具有持刷部，為桿狀體，其一端具有穿孔，穿孔與持刷部之軸心呈相互垂直，且穿孔上至少一側設有凹槽，而凹槽的設置與持刷部之軸心平行，且持刷部之尾端為平整封閉狀，而另一端延設有折彎頸部；固刷件，具有至少一個的鎖固元件並套設於持刷部；以及，握持部，為自桿狀體之折彎頸部延設的長桿體，可供使用者握持。
