A separator structure for Cat 6 cable has a core (2); a shield layer (1) between the core (2) and a jacket, or a jacket (1); four conductor sets (3) each consisting of a pair of conductors (21), and insulating layers (22) covering the conductors provided inside the core (2); and a separator (25) among the four conductor set (3). The separator (25) has a shape of “V”, the bottom end of which is located at the center of the core (2) and the two sides of which respectively separate the adjacent conductor sets (3) from each other.