A substrate connection part (4) of each of a plurality of press-fit terminals (3) pulled out of a housing (1) is inserted into a positioning hole (12) of a terminal arrangement member (11) to adjust alignment of the press-fit terminals (3) with respect to through-holes (7) of a substrate (6). The terminal arrangement member (11) is made of a thin resin sheet material. Each positioning hole (12) is sized so that the press-fit terminal (3) is placed in position by inserting a guide portion (9) of the press-fit terminal (3) therein. Slits (13) extend radially out from an opening edge of the positioning hole (12). When a press-fit portion (8) passes through the positioning hole (12), both slits (13) and the positioning hole (12) expand so that the press-fit portion (8) passes smoothly through the positioning hole (12).