A spiral interdental brush comprising a brush bar and a handle. The brush bar has a body and a resilient tab. The body has a long rod shape and has a free end and a connecting end. The elastic tab is coupled to the outer peripheral surface of the body and between the free end and the connecting end. And the elastic tab spirally extends over 360 degrees along the outer circumference of the body to form a spiral side edge facing away from the body. The handle is attached to one end of the body. Thereby, the spiral interdental brush has sufficient surface area to massage the gums and also has sufficient structural strength to remove the tartar from the tooth gap, thereby effectively improving the use efficiency and convenience.一種螺旋式齒間刷，係包含一刷桿及一握柄。該刷桿具有一本體及一彈性凸片，該本體呈長桿狀且具有一自由端及一連接端，該彈性凸片結合於該本體的外周面並位於該自由端及該連接端之間，且該彈性凸片沿該本體的外周螺旋環繞延伸超過360度，以形成背向該本體的一螺旋側緣。該握柄係連接於該本體的一端。藉此，該螺旋式齒間刷具有足夠的表面積按摩牙齦且亦具有充分的結構強度以便將牙垢由齒縫中排除，有效提昇使用效率及便利性。
