The reliability of electrical connection between electrode terminals of power storage devices and bus bars can be improved. A bent portion that is provided on each bus bar is formed at a position shifted in the left-right direction from an intermediate position between one contact portion of two contact portions of the bus bar and the other contact portion positioned next to the one contact portion. In a bus bar housing portion, a beam portion on which a corresponding bus bar is placed is formed extending in the front-rear direction. Each beam portion is formed at a position shifted in the left-right direction from the bent portion in a state where the bus bar is housed in the bus bar housing portion.