A valve connector for medical conduits for infusion by means of a fluid introducer (S), comprising: a tubular body (1) having an inlet end (4) designed to engage an introducer (S), and an outlet end (10), - a hollow tip (2) axially disposed within the cavity of the tubular body (1) and having a closed tip (32) that is oriented towards said inlet end (4) of the body ( 1) tubular and axially separated from the latter, said hollow tip (2) is in communication with said outlet end (10) and has a separate side hole (31) of said closed tip (32) for communication with the cavity of said tubular body (1), and - a sealing element (3) that includes: - a head (35) having a pre-groove (38) and normally arranged in a closed condition at said inlet end (4) of the body (1) tubular, in which said pre-slot (38) is closed, said elastic head (35) can be moved axially and against said closed tip (32) of hollow tip (2), after inserting said introducer (S) into said inlet end (4), to interact with said closed tips (32) that take an elastically deformed condition of opening of said pre-slot (38), - a hollow elastic element (36) attached to said head (35), interposed between said tubular body (1) and said hollow tip (2) and having sealing means (47, 48) in contact with said hollow point (2) to insulate said lateral hollow (31) with respect to the cavity of the tubular body (1) when said head (35) is arranged in the non-deformed closure condition mentioned above, said element (36 ) hollow elastic includes elastic thrust means (36, 45) that tend to keep said head (35) in said closing condition and which comprises a base part (37) of said sealing element (3), which has a wall generally cylindrical radially separated from said hollow tip (2) with the f in defining with the last one an annular chamber (50)； said base part (37) joins said hollow element (36) through a generally transverse annular wall (45) which, during the axial movement of said elastic head (35) of said closing condition toward
