[Problems] In a connector to which unbalanced-type lines are connected, providing a connector which prevents crosstalk in the connector and an interface apparatus including the connector.[Solutions] Comprising terminals 64 to be connected with connectors 9, a plurality of boards 62 having a plurality of transmission lines, one ends of the transmission lines being connected with the terminals 64, a housing 61 for fixing the plurality of boards 62, and common mode choke coils 65 provided on the boards 62 and connected with balanced-type lines.