In an electrical connection body, a carrier is formed with a through-hole and a wall portion formed upright by a groove portion on both sides of the through-hole, and a connector is provided with a first beam on one end of a connecting portion and a second beam on the other end of the connecting portion, and is also provided with regulating portions on both sides of the connecting portion on the side of the first beam. The regulating portions come into contact with the wall portion to regulate the axial rotation of the connector. The first beam and the second beam are bent with respect to the connecting portion and come into contact with respective opening portions of the through-hole, to thereby regulate the movement of the connector in the forming direction of the through-hole.