The present invention addresses the problem of providing a connector (1) that combines seal integrity, ease of injection and hygiene and a connector valve body (5) that is used by the connector. The present invention, which solves this problem, involves a connector valve body (7) that is provided with: a cylindrical hollow head (21) having an outer peripheral surface (32), which is in close contact with a connection opening (12), and a flat top surface (36), which is exposed to the connection opening (12) a body (23) that is positioned on the opposite side of the top surface (36), and has three through holes (52-54) and a head support part (22) having a second seal (41) positioned between the cylindrical hollow head (21) and the body (23). The present invention also involves a connector (1) that is provided with a connector tube (5) and a connector body (7) having three connection openings (12 to 14), and an internal space (15) linking the three connection openings (12 to 14). The connector (1) is capable of moving: to a first position in which the outer peripheral surface (32) seals the inner peripheral surface of a connection opening (12), and the second seal section (41) presses against an inner peripheral step (19) and to a second position in which the connector contracts in an axial (C) direction due to pressure acting in the axial (C) direction, thereby allowing an inner cavity (81a) of a tube body (81) to communicate with the internal space (15).Le problème de la présente invention réside dans la mise à disposition dun connecteur (1) qui combine lintégrité détanchéité, la facilité dinjection et lhygiène et un corps (5) de soupape de connecteur qui est utilisé par le connecteur. La présente invention, qui résout ce problème, implique un corps (7) de soupape de connecteur qui est équipé de : une tête (21) creuse cylindrique présentant une surface (32) périphérique externe, qui est en contact étroit avec une ouverture (12) de raccordement, et une surface (36) s
