A cable apparatus includes a circuit board having ground and signal pads, an insulating body in front of the circuit board, a pair of differential signal terminals retained in the insulating body, a cable located in front of the insulating body, and a shielding shell fixed to the insulating body. One ground pad is provided on each of two sides of adjacent two signal pads. Each terminal has an elastic portion extending out of the insulating body and conducting the signal pad, and a contacting portion exposed on a surface of the insulating body. The cable has two cable cores connected to the contacting portions, two insulation layers respectively wrapping the cable cores, and a shielding layer wrapping the insulation layers. The shielding shell has one end covering the contacting portions and conducting the shielding layer, and the other end covering the elastic portions and connected to the ground pads.