PURPOSE: To eliminate mechanical connecting deficiency and enhance productivity by fixing holding pieces to a wire holding portion of a connector pin main body, and fusing it by heating and compressive force of an electric rod.

CONSTITUTION: An inserting portion 4 of a connector pin main body 2 is provided with a contact piece 7 which is elastically expanded and brought into contact with the inside of a female side connector socket, and an engaging piece 8 engaged with a socket portion upon being inserted for preventing falling- off a connector pin. When a pin is inserted, the pin is electrically continued to a female side connector and cannot be fallen off. A wire connecting portion 5 of the main body 2 has press-fitting pieces 9, and bent above a conductor wire 10, to press-fit an electric connecting portion of the conductor wire 10 to the main body 2. A wire holding portion 6 of the main body 2 is provided with holding pieces 11 in the vicinity of an end of the conductor wire 10 inserted into an insulating sleeve 3. The holding pieces 11 are bent above the sleeve 3, fixed to the main body 2 from the outside. When the holding piece 11 is fused by heat and press-fitting force of an electric rod, it is possible to eliminate mechanical connection deficiency and enhance productivity.