BATTERY PACK

A battery pack includes a terminal board electrically connecting terminals of a plurality of battery cells to each other. The terminal board is thinner than a bus bar and welded to the terminals of the battery cells. The terminal board includes an elongated portion extending in a direction in which the battery cells are arranged and a plurality of fixation portions arranged at intervals on a long side of the elongated portion. The bus bar includes a plurality of fixation portions respectively placed in face-to-face contact with the fixation portions of the terminal board. Fasteners fasten the fixation portions of the terminal board and the fixation portions of the bus bar to fastener-receiving portions.