<p>A connector comprising a header connector 20 and a socket connector 25. The connector 25 includes a fixed section 272 that is continuously formed at the tip of one end 2711 of a contact section 271 so that a part 2721 of the section 272 is arranged in parallel with the one end. A housing 26 of the connector 25 sandwiches and retains both sides of the part 2721 between a pair of facing retention grooves, and also sandwiches and receives both sides of the one end 2711 between a pair of facing guiding grooves so that the one end 2711 can move only along facing surfaces including the above each groove.</p>
