CONTACT SET

PROBLEM TO BE SOLVED: To transmit even specific high frequency and provide compatibility for inserting an RJ45 male connector by releasing electric contact of first and second pairs of pins respectively provided for first and second holder portions when a first male connector is connected and by holding the electric contact of first and second pairs of pins when a second male connector comprising four pairs of pins is connected. SOLUTION: Even frequency up to 600 MHz especially, and frequency over it can be transmitted. Pairs 1, 2 of connecting pins are provided in holder portions 7, 8, and a holder portion 9 receiving an RJ45 male connector is provided with a series of connecting pin pairs 3-6. A series of eight wires are provided so as to connect with the connecting pin pairs 1-4. Pairs 5, 6 of connecting pins are provided for the RJ45 male connector. The pair 6 of connecting pins is connected with the pair 2 of connecting pins through an electric connecting portion, and the pair 5 of connecting pins is connected with the pair 1 of connecting pins. When a connector corresponding to the connecting pins is plugged, a signal is transmitted to the wires. The connecting pin pairs 3, 4 are at an end portion of the series of pins and restrain crosstalk.