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A battery pack capable of preventing tab breakage due to swelling of battery cells, and a vehicle including the same, and the battery pack includes: a cell assembly including a plurality of battery cells arranged in at least one row; and a busbar assembly electrically connected to the cell assembly, wherein the busbar assembly includes: a busbar frame provided in a predetermined length along a direction of arrangement of the plurality of battery cells; and at least one busbar connected to electrode leads of the plurality of battery cells and mounted to the busbar frame so as to be movable along a length direction of each busbar frame.