A connector device (10) has a connector (20) to be mounted on a metal case (11) that accommodates a device therein and is covered by a first shield shell (50) and a second shield shell (60). Connecting portions for connecting the first and second shield shells (50, 60) are provided at least at three positions and these connecting portions are arranged at positions displaced in a connecting direction of the connector (20) and a mating connector (40) and a direction orthogonal to the connecting direction. The connecting positions of the first and second shield shells (50, 60) are well-balanced to provide a good a shielding performance.