To fix an accepting pin so that an inserting pin can be inserted from the surface of an electric circuit board on the side opposite to the surface of the electric circuit board to which the accepting pin is fixed in two pairs of pins capable of connecting by fitting the inserting pin to the accepting pin.

The tip of a first fixing terminal 3 and the tip of a second fixing terminal 4 are faced in the same direction as an inserting hole 1 for inserting an inserting pin. The inserting hole 1 of an accepting pin formed so as to face in the same direction as the first fixing terminal 3 and the second fixing terminal 4 is faced to an electric circuit board, and by inserting an inserting pin 6 into a circuit board hole, the inserting pin 6 is also inserted from the side opposite to the surface of the electric circuit board to which the accepting pin 5 is fixed.