the invention concerns a branch connector device for a shielded cable connecting a plurality of stations of a land network . the device comprises : a junction box comprising a housing , an electromagnetic shield and two entries for two respective sections of the shielded cable ; a connector comprising a plurality of contacts and an electromagnetic shield . according to the invention the housing of the junction box forms the housing of the connector ; the shield of the junction box also forms the shield of the connector ; and the conductors of each section of the cable are connected directly to the contacts of the connector . applicable to industrial data processing .