PROBLEM TO BE SOLVED: To improve the cleaning property of a male connector having a screw-shaped projection formed on the inner surface of an outer cylinder surrounding a male luer. A male connector (1) has a male luer (11) in which a flow path (18) is formed, a bottom plate (13) protruding outward from a root of the male luer (11), an outer cylinder (15) provided on the bottom plate (13), and an inner surface of the outer cylinder (15). And a screw-shaped projection 16 formed on the. Through holes 21 and 22 are formed in at least one of the bottom plate 13 and the outer cylinder 15. [Selection diagram] 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
