A medical connector and one-way valve module for connecting with a tube are disclosed.The tube has a port,and the one-way valve module includes a first flap member and a second flap member.The first flap member is installed on the port sealed thereof.The first flap member has a first seamthe second flap member has a second seam and is stacked on the first flap member,wherein the first seam and the second seam are provided in a cross configuration.Therefore,a detector can be put in the tube for detecting air pressure,MDI and temperature etc.Then gas in the tube will not be leaked from the first seam and the second seam.本發明係關於一種醫療用接頭及其單向氣閥模組,用於一連接管,連接管具有一連通口,此單向氣閥模組包括一第一活瓣件及一第二活瓣件,第一活瓣件安裝並封閉於連通口,第一活瓣件設有一第一剖開縫;第二活瓣件與第一活瓣件相互層疊,第二活瓣件設有一第二剖開縫,第一剖開縫與第二剖開縫呈交叉配置。藉此,方便連接管插入偵測器以偵測氣壓、MDI、氣體、溫度或插入抽痰管以抽痰,並有效防止連接管內部的氣體自第一剖開縫與第二剖開縫的交叉處外洩,以達到醫療用接頭與單向氣閥模組具有優良地使用便利性及氣體防洩性。10‧‧‧醫療用接頭1‧‧‧連接管11‧‧‧第一管體111‧‧‧連通口112‧‧‧第一接口113‧‧‧端緣115‧‧‧第一卡環12‧‧‧第二管體121‧‧‧第二接口122‧‧‧第二環槽2‧‧‧單向氣閥模組21‧‧‧第一活瓣件211‧‧‧第一剖開縫212‧‧‧第一盤體2121‧‧‧凸點213‧‧‧環壁214‧‧‧止擋凸環22‧‧‧第二活瓣件221‧‧‧第二剖開縫222‧‧‧第二盤體2221‧‧‧凹槽3‧‧‧第一旋轉管31‧‧‧第一環槽4‧‧‧第二旋轉管41‧‧‧第一卡環
