Abstract: A connector includes a first housing including a plurality of first cavities extending in a front-rear direction and a first surface, first terminal fittings to be accommodated into the first cavities, a second housing including a plurality of second cavities extending in the front-rear direction and a second surface, second terminal fittings to be accommodated into the second cavities, and a hinge portion linking the first housing and the second housing such that the first housing and the second housing are displaceable to an open position OP where the first surface and the second surface are arranged in a lateral direction and a closed position CP where the first surface and the second surface are facing each other in the lateral direction. The plurality of first cavities and the plurality of second cavities are respectively arranged side by side in the lateral direction at the open position OP.