To connect a large number of circuits to each other by a small connector.

Conductive belts 6 and 7 of plural rows are formed in both surface same positions of a printed wiring board where copper foil is layered on both surfaces, and a recess electrode 6a and a projecting electrode 7a are respectively formed on one ends of the conductive belts 6 and 7, and respective central parts of electrode plates 3, 4 and 5 and electrode plates 9, 10 and 11 are connected to each other by plastic support tools 2, and a pair of connector pieces 1 and 8 are formed. The tips of the electrode plates 3, 4 and 5 and the electrode plates 9, 10 and 11 to which cord are connected, are alternately superposed on each other, and both support tools 2 are fitted in installing grooves 13 of a case 12, and the superposed recessed electrode 6a and projecting electrode 7a are fastened by a fastening bolt 15.