A Medical Device to form a Fluid Communication path includes Member 13 connection to form a Flow Path of Communication between objects to be communicated when bind and a protective Cap that has a Cylindrical shape with a Closed end holds an 18 Member impregnated with germicide in the background and can bind to at least one of the members Connection when you are separated.Determines a dimensional relationship between at least one of the connecting members and the protective cover so that the internal circumferential surface of the protective cover forms a Space 19 around the front end portion of the connecting Member and the Member impregnated With germicide is opposite to the front end portion of the connecting Member with a distanceAmong them. A Sealing Member 8 is provided in the internal circumferential surface of an Opening end of the protective cover and the external circumferential surface of the connecting member in a location that corresponds to the Opening end of the protective cover.When the protective cover is attached to the connecting Member, the Sealing Member is pressed between the external circumferential surface of the connecting Member and the Inner circumferential surface of the protective cover, thereby providing an airtight Space structure.The Front End portion of the connecting Member can be sterilized effectively through the Union of the lid Member Connection. In addition, it is possible to avoid the leakage of Germicidal caused by contact between the Member and the contact Member with germicide.Un dispositivo médico para formar una trayectoria de comunicación de líquido incluye miembros 1, 3 de conexión que forman una trayectoria de comunicación de flujo entre objetos a ser comunicados cuando se unen y una tapa protectora 2 que tiene una forma cilíndrica con un extremo cerrado sujeta un miembro 18 impregnado con germicida en el fondo y puede unirse a por lo menos uno de los miembros de conexión cuando se separan. Se determina una relación dim
