A junction structure for electrically connecting a plurality of connection conductors at one end of a flat cable, which includes a plurality of electrical conductors arranged parallel in an insulating material, and electrical conductors of a plurality of lead wires. The junction of the flat cable comprises a first fixing member formed integrally with one of the flat cable and the lead wires, and a second fixing member fixing the other of the flat cable and the lead wires to the first fixing member to thereby temporarily connect the respective corresponding electrical conductors of the flat cable and the lead wire.