BATTERY MODULE

A cover body has: a plurality of divided cover portions arranged side by side in a Y axis direction; an elastic deformation portion extending between the divided cover portions adjacent to each other; a first connection portion provided in a first divided cover portion disposed at one end portion in the Y axis direction, the first connection portion being connected to the attachment-target member so as to be fixed in the Y axis direction; a second connection portion provided in a second divided cover portion disposed at the other end portion in the Y axis direction, the second connection portion being connected to the attachment-target member so as to be fixed in the Y axis direction; and a third connection portion disposed between the first connection portion and the second connection portion and connected to the attachment-target member so as to be slidable in the Y axis direction.