PURPOSE: To enhance workability while reducing cost by making a plurality of connecting holes through a bus bar and then tightly inserting a member for connecting laminated bus bars into the connecting hole.

CONSTITUTION: Laminated bus bars 11 are connected through connecting members 15 tightly inserted into connecting holes 14 made through the bus bars 11 and current flows through the bus bar 11 through the connecting member 15 and the connecting hole 14. Since the bus bar 11 can be manufactured through punching, workability thereof is enhanced. Furthermore, connection of the laminated bus bars 11 can be varied by varying the length of the connecting member 15. According to the constitution, different circuit can be formed in an electrical joint box without requiring dedicated die while furthermore cost of the electrical joint box can be reduced by employing commonable electric components other than the connecting member 15.