Medical device of the present invention aims to provide a receptacle and plug and the electrical medical instrument connector structure capable of separating the ground connection terminal and the internal ground circuit when unmated, Therefore, the present invention use connectors, a plug 50 having a communication terminal 51 and the ground terminal 52 a connector 60 having a fittable fitting portion 60a, the ground electrically connected to the connection object disposed in the vicinity of the fitting portion A communication contact terminal 61 which is provided in the fitting portion and is electrically connected to the communication terminal when the fitting portion and the plug are fitted to each other, a fitting portion and a plug and a ground connection terminal 65 for electrically connecting the conjunction with the ground portion and the ground terminal to the fitting of the, through the ground connection terminal and the ground portion and the ground terminal when fitting connection between plug and connector It is connected to Te, plug and connectors When releasing the engagement connection between the electrically separated from the ground portion and the ground terminal.本発明は、レセプタクルとプラグとの非嵌合時に接地接続端子と内部接地回路とを電気的に分離させ得る構造の医療機器用コネクタを提供することを目的とし、そのために、本発明の医療機器用コネクタは、通信端子５１と接地端子５２とを有するプラグ５０を嵌合可能な嵌合部６０ａを有するコネクタ６０であって、嵌合部近傍に設けられ電気的に接続された接続対象を接地する接地部６３と、嵌合部に設けられ嵌合部とプラグとが嵌合された時に通信端子と電気的に接続される通信接点端子６１と、嵌合部に設けられ嵌合部とプラグとの嵌合に連動して接地部と接地端子とを電気的に接続させる接地接続端子６５とを備え、プラグとコネクタとを嵌合接続した時には接地端子と接地部とは接地接続端子を介して接続され、プラグとコネクタとの嵌合接続を解除した時には接地端子と接地部とは電気的に分離される。
