An access device for bottles, comprising a body (1) having an outstanding annular skirt (21) that is elastically deformable, for coupling the complementary shaped neck of a bottle, a tubular spike (15) extending coaxially within said annular skirt (21) for insertion into the bottle, and a tubular connector (3) protruding from the body (1) on the side opposite said annular skirt (21) and in fluid communication with said tubular pin (15), wherein the tubular spike (15) and the annular skirt (21) are arranged, respectively, within a first and second parts (13, 14) different from each other, and of which the first part (13) carrying the tip Tubular (15) is permanently attached to said body (1) and the second part (14) carrying said annular skirt (21) can be connected to the first part (13) through an irreversible coupling (18, 24, 25 , 26, 27), characterized in that the first part (13) comprises a disk generally circular from which said tubular pin (15) centrally protrudes, around which a crown of hollow axial projections (27) is arranged, and the second part (14) is formed with a crown of corresponding axial holes (26), inside of said hollow axial projections (27) are coupled and blocked by means of plastic deformation.Un dispositivo de acceso para frascos, que comprende un cuerpo (1) que tiene un faldón anular sobresaliente (21) que es elásticamente deformable, para acoplar el cuello conformado complementario de un frasco, una espiga tubular (15) que se extiende coaxialmente dentro de dicho faldón anular (21 ) para introducir en el frasco, y un conector tubular (3) que sobresale del cuerpo (1) en el lado opuesto a dicho faldón anular (21) y en comunicación de fluido con dicha espiga tubular (15), en donde la espiga tubular (15) y el faldón anular (21) están dispuestos, respectivamente, dentro de una primera y segunda partes (13, 14) distintas entre sí, y de las cuales la primera parte (13) que porta la punta tubular (15) está unida permanentemente a dicho cuerpo (1) y
