Electrical connector and electrical connector device

An electrical connector device comprising:

• a first connector to which a terminal portion of a signal transmission medium is to be coupled;
• and
• a second connector in which the first connector fits as the second connector is implemented on a front surface of a circuit board, a first contact member mounted on the first connector being connected to the signal transmission medium, a board connection leg of a second contact member mounted on the second connector being connected to the circuit board, and the first contact member making contact with the second contact member when the first and second connectors fit together to establish electrical connection, and
• a fit-in holding member rotatably provided to the first connector being rotated from a fit-in release position to a fit-in operation position when fitting in the second connector to keep a state of the fitting in the second connector, wherein
• the fit-in holding member of the first connector is provided with a shield plate which covers at least a board connection leg of the second contact member when the fit-in holding member is rotated to the fit-in operation position,
• a ground connection conductive path is formed at a predetermined position on the front surface of the circuit board near a portion to be connected with the board connection leg of the second contact member,
• a ground connecting unit provided to the fit-in holding member makes contact with the ground connection conductive path of the circuit board when the fit-in holding member is rotated to the fit-in operation position, and
• the ground connecting unit of the fit-in holding member is integrally and contiguously formed on the shield plate.