Valve connector for medical infusion lines according comprising an externaltubular body (1) with an inlet end (4) and an outlet end (6, 7), a hollowinternal pin (2) and an intermediate elastic sealing member 3 comprising ahead (13) with pre-slotting (15) and an elastic hollow element (14) abuttedradially against the hollow pin (2). The hollow pin (2) has a closed terminal(9) shaped, as a result of the insertion of a fluid introducer (S) into theinlet end (4), in such a way as to make the elastic head (13) assumed anelastically deformed configuration without crossing the pre-slotting (15),which is opened to place in communication the inlet end (4) with the outletend (6, 7) through lateral holes (12) of the hollow pin (2).
