Provided is an applicator that can more reliably insert the entirety of a tampon main body into a vaginal cavity. A protruding part (60) that is in sliding contact with one part of an inner peripheral surface (33) of an outer cylinder (30) is positioned on a rear end (42) side of an outer peripheral surface (43) of an inner cylinder (40). The protruding part (60) has an outer shape that becomes gradually wider toward the rear from an apex (61) that is positioned at a front end.本發明的課題在於提供可更確實地將棉條本體的整體插入陰道內的導管。解決手段為一種棉條用導管，其在內筒(40)之後端(42)側的外周面(43)，具有與外筒(30)之內周面(33)的一部分滑接的隆起部(60)，且隆起部(60)係具有從位於前端的頂點(61)朝向後方逐漸變得寬廣的外型。
