A method and apparatus for connecting, in an intermediate place and without cutting it, to a coaxial cable wherein an oblong section of the outer insulation is sliced out and the outer conductor is moved away discovering the inner insulation. The central conductor is connected with an electrical conductor which has one end forked, adapted to penetrate the inner insulation. The other end has a tubular shape, adapted for the insertion of the central contact of a coaxial connector, and it is insulated in it's outside surface to avoid electrical contact with a second part which provides the electrical connection of the outer conductor. The second part is a tubular metallic housing, externally threaded to screw into a standard coaxial connector, one end has a constriction, reducing the internal and external diameter, with the purpose to facilitate the insertion in the coaxial connector and to provide an internal shoulder that holds the insulated central conductor. The other end has two projecting pins diametrically opposed, adapted to penetrate the external insulation and electrically contact the outer conductor of the coaxial cable. A plastic jacket with self locking borders keeps the coaxial cable securely attached to the electrical contacts.