Stationary housings 20 involve stationary-side reinforcing fittings 80 secured in place in said stationary housings 20 via integral molding with said stationary housings 20 and, moreover, a movable housing involves movable-side reinforcing fittings 60, 70 secured in place in said movable housing 30 via integral molding with said movable housing. The stationary-side reinforcing fittings 80 involve exposed portions 82 exposed from the stationary housings 20 at locations outside the terminal array range of said terminals in the terminal array direction, and the movable-side reinforcing fittings 60, 70 involve expanded portions 63, 73 protruding from the movable housing 30 at locations outside the above-mentioned array range.