The present invention provides a medical connector that is mounted to a container body of a nutrient container so as to connect interior and exterior of the container body and comprises a connector body 22 a membrane 16, which is mounted to the connector body to prevent a liquid nutrient received in the container body from flowing out of the nutrient container a flow passage opening member 19, which is mounted to a mounting section 21 of the connector body and a connection keeping section 19e, which keeps a connection condition with the connector. Further the flow passage opening member comprises: a communication section 19a, which comprises a piercing section 194 and a flow passage that allows the liquid received in the container body to flow out of the nutrient container and a barrel 19b. The flow passage opening member 19 may take a first mounting condition and a second mounting condition with respect to the mounting section 21.本發明之醫療用連接頭係固定於營養劑用容器之容器本體部,且可使上述容器本體部之內外連通者,且包含:連接頭本體部22;薄膜16,其係安裝於連接頭本體部,阻擋容器本體部內之液狀物向營養劑用容器外流出;流路開通構件19,其係安裝於連接頭本體部之安裝部21;及連接保持部19e,其可保持與連接器之連接狀態;且,流路開通構件包含:連通部19a,其包括穿刺部194及可使填充於容器本體部之液狀物向營養劑用容器外流出之流路;及筒狀部19b;流路開通構件19可對於安裝部21採取第1安裝狀態及第2安裝狀態。13...醫療用連接頭16...薄膜17...頂面部17a...頂面部之下表面18...側壁部19...流路開通構件19a...連通部19b...第1筒狀部(筒狀部)19c...第2筒狀部19d...上表面部19e...爪部(連接保持部)151...中心軸190a...紋狀槽194...穿刺部20...基部20a...空間21...安裝部21a...第1管狀部(管狀部)21b...第2管狀部21c...紋狀肋部21e...貫通孔211...環狀槽22...連接頭本體部
