BATTERY PACK

A battery pack including a plurality of battery cells arranged along a first direction; a holder, the holder including terminal holes exposing terminals of the battery cells, and pairs of first plates separated from each other between adjacent terminal holes and pairs of elastic pieces that are bent from the pairs of first plates in opposite directions along the first direction; and bus bars, each of the bus bars including coupling portions at opposite sides thereof and coupled to adjacent terminal holes, and a central bent portion connecting the coupling portions and extending around corresponding pairs of elastic pieces to surround the corresponding pairs of elastic pieces.