A connector to be detachably fitted with a connecting object, includes a required number of contacts, a housing, and a pivoting member acting upon the contacts to bring them into contact with a connecting object. A secondary stretcher support is positioned laterally interior of and parallel with each outer frame leg, each of the secondary stretcher support and outer frame leg including stretcher holders. Furthermore, the first and the second mold core have a planar portion at the end surface facing the cavity. The diaphragm has a plurality of arms whose outlines are curved so that the intermediate regions thereof are reduced in width.