A battery pack includes: a plurality of unit cells arranged side by side in a first direction and each comprising a first terminal and a second terminal to improve the durability and safety of the battery pack; a protection circuit module disposed on the plurality of unit cells; and a temperature element unit disposed on the plurality of unit cells in the first direction and comprising a first temperature element, a second temperature element, a first plate connecting the first temperature element and the second temperature element, and a second plate having an end electrically connected to the protection circuit module and another end electrically connected to the first plate disposed between the first temperature element and the second temperature element.