Abstract: In a connector for connecting a flat connection object with a circuit board having a signal circuit and an earth circuit, the flat connection object has a conductive signal pattern and a conductive shield pattern opposite to each other. The connector is provided with an insulator housing holding a conductive hold down which is used in fixing the insulator housing onto the circuit board and is connected to the earth circuit. In order to connect the signal pattern with a contact held to the housing, a pressing member is used and moved relative to the insulator housing. The pressing member is conductive and is brought into contact with the conductive shield pattern and with the conductive hold down when the pressing member makes the flat connection object be connected to the contact.