A bus bar comprising: members made from a conductive material and consecutively arranged to form a plate shape defining a wiring pathway, wherein the members adjacent to each other are laser joined members, the members include: a first connection member arranged at one end of the wiring pathway and having a first connection portion for electrical input-output; and a conductive member connected to the first connection member in a state where connection surfaces (23, 25) of the first connection member and the conductive member located in a same plane are in contact with each other, and in the members, only the first connection member is plated, characterized in that the members include a second connection member arranged at the other end of the wiring pathway and having a second connection portion for electrical input-output, the second connection member is connected to the conductive member in a state where connection surfaces (27, 33) of the conductive member and the second connection member located in a same plane are in contact with each other, and in the members, only the first connection member and the second connection member are plated. members made from a conductive material and consecutively arranged to form a plate shape defining a wiring pathway, wherein the members adjacent to each other are laser joined members, the members include: a first connection member arranged at one end of the wiring pathway and having a first connection portion for electrical input-output; and a conductive member connected to the first connection member in a state where connection surfaces (23, 25) of the first connection member and the conductive member located in a same plane are in contact with each other, and in the members, only the first connection member is plated, characterized in that the members include a second connection member arranged at the other end of the wiring pathway and having a second connection portion for electrical input-output, the second connection member is connected to the conductive member in a state where connection surfaces (27, 33) of the conductive member and the second connection member located in a same plane are in contact with each other, and in the members, only the first connection member and the second connection member are plated. a first connection member arranged at one end of the wiring pathway and having a first connection portion for electrical input-output; and a conductive member connected to the first connection member in a state where connection surfaces (23, 25) of the first connection member and the conductive member located in a same plane are in contact with each other, and in the members, only the first connection member is plated, characterized in that the members include a second connection member arranged at the other end of the wiring pathway and having a second connection portion for electrical input-output, the second connection member is connected to the conductive member in a state where connection surfaces (27, 33) of the conductive member and the second connection member located in a same plane are in contact with each other, and in the members, only the first connection member and the second connection member are plated.