Connectors with internal noise filter (10A, 10B) are provided with a uniting means (17, 18) for uniting the connectors with internal noise filters with each other. A terminal fitting (20) connected to one electrode portion (32A) of a capacitor (30) is provided in a connector housing (11a, 11B). A ground connection terminal (40A, 40B) is composed of an electrode connecting portion (42) to be connected to the other electrode portion (32B) of the capacitor (30) and a ground connection portion (41A, 41B) extending outwardly of the connector housing (11A, 11B) from the electrode connecting portion (42) and including a bolt hole (46H) into which a bolt (B) is fittable. When the respective connectors with internal noise filter (10A, 10B) are united by the uniting means (17, 18), the respective ground connection portions (41A, 41B) are overlapped and the respective bolt holes (46H) are aligned.