BATTERY PACK

A battery pack (1) has a cell (100), a bus bar (inter-cell bus bar 302), a harness (400A) that includes a terminal (401) connected to the inter-cell bus bar (302) and an electrical wire (402), and a holding member (bus bar holder 311) that holds the inter-cell bus bar (302). The bus bar holder (311) includes a base portion (311M) and a projecting portion (311N). The harness (400A) includes a first connection portion (400P) in which the inter-cell bus bar (302) and the terminal (401) are connected to each other and a second connection portion (400Q) in which the terminal (401) and the electrical wire (402) are connected to each other. The projecting portion (311N) includes a first wall portion (311d) adjacent to the first connection portion (400P) and a second wall portion (311e) adjacent to the second connection portion (400Q). The first wall portion (311d) and the second wall portion (311e) are adjacent to the harness (400A). The second wall portion (311e) includes a portion extending beyond than the second connection portion (400Q) in a direction away from the cell (100).