PROBLEM TO BE SOLVED: To improve the washability of a male connector in which a spiral protrusion is formed on an internal surface of an external cylinder surrounding a male luer.SOLUTION: A male connector 1 includes a male luer 11 formed with a flow channel 18, a bottom plate 13 projecting outwardly from the bottom of the male luer 11, an external cylinder 15 provided to the bottom plate 13, and a spiral protrusion 16 formed on an internal surface of the external cylinder 15. Through-holes 21 and 22 are formed in at least one of the bottom plate 13 and the external cylinder 15.SELECTED DRAWING: Figure 1C【課題】オスルアーを取り囲む外筒の内面に螺状突起が形成されたオスコネクタの洗浄性を向上させる。【解決手段】オスコネクタ１は、流路１８が形成されたオスルアー１１と、オスルアー１１の根元から外向きに突出した底板１３と、底板１３に設けられた外筒１５と、外筒１５の内面に形成された螺状突起１６とを備える。底板１３及び外筒１５のうちの少なくとも一方に貫通孔２１，２２が形成されている。【選択図】図１Ｃ
