A female connector housing is provided with a plurality of terminal accommodating chambers. Each of the terminal accommodating chambers is provided, on its front face, with a terminal insertion opening through which a male terminal is to be inserted. Each of the terminal accommodating chambers is provided, on its rear face, with a wire withdrawal opening. In the terminal accommodating chamber which is intended to accommodate no terminal, there are provided a first shielding wall which surrounds an erroneous-insertion allowable space allowing the male terminal to be inserted erroneously and shields the interior of the erroneous-insertion allowable space and a second shielding wall for shielding the wire withdrawal opening.