PROBLEM TO BE SOLVED: To provide a conversion adaptor with a simple configuration which can connect a hard male connector having a locking female screw and a male connector on the side of a conventional enteral nutrition administration set.SOLUTION: A conversion adaptor 1 comprises a connection tube 12 for connecting a first male connector and a second male connector. The connection tube 12 comprises one end side portion 15 having a first conical inner surface 13 and a male screw 14 corresponding to a first conical outer surface and a female screw of the first male connector, and the other end side portion 17 having a second conical inner surface 16 corresponding to a second conical outer surface of the second male connector. The entire connection tube 12 is formed of the same resin material.SELECTED DRAWING: Figure 4【課題】ロック用の雌ネジを有する硬質の雄コネクタと従来の経腸栄養投与セット側の雄コネクタとを連結できる簡便な構成の変換アダプタを提供する。【解決手段】変換アダプタ１は、第１雄コネクタと第２雄コネクタとを連結する連結管１２を備える。連結管１２は、第１雄コネクタの第１円錐外面及び雌ネジにそれぞれ対応する第１円錐内面１３及び雄ネジ１４を有する一端側部分１５と、第２雄コネクタの第２円錐外面に対応する第２円錐内面１６を有する他端側部分１７とを備える。連結管１２は、全体が同一の樹脂材料で形成される。【選択図】図４
