Disclosed are a connector and a manufacturing method thereof. The connector includes a female housing, one or more first female terminals installed in the female housing, a plurality of second female terminals installed side by side with the first female terminals in the female housing and connected to wires, a first terminal holder having a plurality of terminal grooves to allow the one or more first female terminals to be selectively coupled thereto, the first terminal holder being fastened to the female housing in a state in which the first female terminals are coupled, and a bus bar installed in the first terminal holder to allow one of the one or more first female terminals installed in the plurality of terminal grooves and the second female terminals to be connected thereto.