Male luer type connector with valve comprising a cover, (1) a tubular member (5) having an inlet portion (7) and an outlet portion (6) with an open end end (11), a hollow element elastic (15) secured to the cover (1) and enclosing the tubular member (5), the hollow elastic element (15) has an end wall (20), which seals normally closes said end end (11) of the portion outlet (6) of the tubular member (5) and has a cut (21), and a collar (28) interposed between the cover (1) and the elastic hollow element (15) and axially movable, after the thrust interconnection by a female connector that can be connected to the male connector, causing a stretching deformation of said elastic hollow element (15) and the consequent opening of the flow passage between said inlet portion (7) and said outlet portion (6) of the tubular member (5), characterized in that it comprises a priming cap (1) of the co nector to provide stretching deformation of said elastic element (15) and to maintain said terminal end (11) of the outlet portion (6) of the tubular member (5) in communication with the atmosphere through a liquid impermeable barrier ( 34), said primer cover (30) comprises a skirt (31) disposed outside the cover (1) and configured to interconnect said cover (1) and the tubular part (32, 33) coaxial to said skirt (31), the which carries said liquid impermeable barrier (34) and is arranged to interact with said collar (28) interposed between the cover (1) and the hollow elastic element (15).Conector de tipo luer macho con válvula que comprende una cubierta, (1) un miembro tubular (5) que tiene una porción de entrada (7) y una porción de salida (6) con un extremo terminal abierto (11), un elemento hueco elástico (15) asegurado a la cubierta (1) y que encierra el miembro tubular (5), el elemento hueco elástico (15) tiene una pared terminal (20), la cual sella normalmente cierra dicho extremo terminal (11) de la porción de salida (6) del miembro tubular (5) y tiene un corte (21), y un co
