Fork-like connector terminals are moved along the pass line under guidance so that the forked end part thereof won't pass astray from the predetermined passageway. A plating brush, which has been positioned in alignment with the predetermined passageway of the end part of said fork-like connector terminal, is moved into the gap between the opposing portions to be plated at the end of each terminal or passed through said gap in such a way that said brush contacts only the small-area portions to be plated and applies thereto the plating solution supplied to said brush by the liquid retaining material to thereby perform desired plating.