Connection member, electric component unit, and battery device

A connection member comprising a primary bus bar and a secondary bus bar, each of which includes a main body portion and a connection terminal portion while the connection terminal portion is formed at the main body portion and serves as a portion to be connected to a corresponding component-side terminal portion of an electric component, wherein:

• in a state where the primary bus bar and the secondary bus bar are arranged one after another in a perpendicular direction that is perpendicular to a surface of the main body portion of each of the primary bus bar and the secondary bus bar, the connection terminal portion of the primary bus bar and the connection terminal portion of the secondary bus bar are arranged one after another in a crossing direction that crosses the perpendicular direction.