A busbar includes a plurality of main terminals (upstream side terminal, downstream side terminals) and one auxiliary terminal conductively connected to one of the main terminals and is press-formed in an integrated manner. The auxiliary terminal is connected to the main terminals through connection bars which are all cut off, except for one, in a cutting process after a pressing process, and the circuit configuration can be changed by selectively cutting off the connection bars. Therefore, there is no need to change the shape of a press die, and the production efficiency can be improved using a die having a uniform shape.