Problem to be solved: to provide an injection molded product for constituting a female connector portion of a medical connector which can easily secure a sufficient holding force of the ear portion of the valve body by a holder.The injection molded article according to the present invention comprises a valve body having an ear portion positioned radially outward from the outer peripheral surface of the valve body, and a holder having a first surface which is in contact with the ear portion and a second surface which is in contact with the outer peripheral surface of the valve body portion, and the ear part And the first surface of the holder is formed integrally with each other, and the outer peripheral surface of the valve body portion and the second surface of the holder are integrally molded with bond strength which is weaker than the bond strength between the ear portion and the first surface of the holder InIt is characterized that they are not joined to each other.Diagram【課題】ホルダによる弁体の耳部の十分な保持力を容易に確保することができる、医療用コネクタのメスコネクタ部を構成するための射出成形品を提供する。【解決手段】本発明に係る射出成形品は、弁本体部の外周面より径方向外側に位置する耳部を有する弁体と、前記耳部と接した第1表面と前記弁本体部の前記外周面と接した第2表面とを有するホルダとを備え、前記耳部と前記ホルダの前記第1表面とは、互いに一体に成形されており、前記弁本体部の前記外周面と前記ホルダの前記第2表面とは、前記耳部と前記ホルダの前記第1表面との接合強度より弱い接合強度で互いに一体に成形されており、又は互いに接合していないことを特徴とする。【選択図】図5