<p>A connector (1) includes a female connector (12) and a male connector (14) fitted in a hood (23) of the female connector (12). The female connector (12) includes: paired guide grooves (27) either provided at opposed positions on an inside wall of the hood (23); and regulation projections (29) either provided on bottom surfaces of the paired guide grooves (27). The male connector (14) includes paired guide ribs (43) provided on an outer periphery of the male connector (14). The paired guide ribs (43) either positioned in the paired guide grooves (27) with the female connector (12) and the male connector (14) being fitted together regulate a relative rotational movement between the female and male connectors (12, 14). The regulation projections (29) either in contact with the paired guide ribs (43) regulate a relative vertical and transverse movement between the female and male connectors (12, 14).</p>
