A circuit board for a communication connector, comprising a first signal input terminal, a first signal output terminal, a second signal input terminal, a second signal output terminal, a first signal wire, a second signal wire, a capacitive structure and a capacitive cylinder. The first signal input terminal and the first signal output terminal are coupled by the first signal wire; the second signal input terminal and the second signal output terminal are coupled by the second signal wire; the capacitive structure is coupled with the first signal wire; the capacitive cylinder is coupled with second signal wire. The capacitive structure and the capacitive cylinder are capacitive coupled between the first signal wire and the second signal wire.