To provide a connector wherein ground terminals can be designed easily, which not only suppresses the occurrence of impedance mismatch and crosstalk, but which does not lead to interferences between contacting portions. A ground terminal for a connector has a cylindrical main body. A plurality of contacting portions, for contacting a circuit board, are formed on the bottom edge of the cylindrical main body. The ground terminal has, as contacting portions, inner contacting portions and outer contacting portions. The inner contacting portions extend toward the inside of the cylindrical main body and in the downward direction, and the outer contacting portions extend toward the inside of the cylindrical main body and in the downward direction.