A battery pack comprising: a plurality of battery modules; a vent frame disposed along edges of the plurality of battery modules; and a housing accommodating the plurality of battery modules and the vent frame, wherein the vent frame includes a pair of vertical beams formed parallel to a first direction and a pair of horizontal beams formed parallel to a second direction intersecting the first direction, wherein the vertical beam and the horizontal beam each have a shape of a tube and include a cover (311, 321) formed on the vertical beam or the horizontal beam in a length direction, and a passage (312, 322) surrounded by the cover for gas to pass through, wherein each of the battery modules includes a battery cell stack in which a plurality of battery cells are stacked, a module frame accommodating the battery cell stack, and an end plate covering the battery cell stack exposed to each of two ends of the module frame, wherein the end plate includes at least one vent gate formed in the shape of a tube externally protruding from the end plate and communicating with the inside of the battery module, wherein the vent gate is disposed in the battery pack to face the outside of the battery pack, and is disposed in each of the two ends of the battery pack in the first direction to face the outside, wherein the cover of the horizontal beam includes at least one first connection hole opposite to one of the plurality of battery modules, wherein the vent gate is formed opposite to the at least one first connection hole for the vent gate and the horizontal beam to communicate with each other, wherein the cover (311, 321) of any one of the vertical beam and the horizontal beam includes a second connection hole formed at a portion where the vertical beam and the horizontal beam intersect with each other and communicating with the passage (312, 322) of any one of the vertical beam and the horizontal beam, and characterized in that the battery pack further comprises at least one burst portion formed on the outside of the horizontal beam and connected to the passage (312, 322). a plurality of battery modules; a vent frame disposed along edges of the plurality of battery modules; and a housing accommodating the plurality of battery modules and the vent frame, wherein the vent frame includes a pair of vertical beams formed parallel to a first direction and a pair of horizontal beams formed parallel to a second direction intersecting the first direction, wherein the vertical beam and the horizontal beam each have a shape of a tube and include a cover (311, 321) formed on the vertical beam or the horizontal beam in a length direction, and a passage (312, 322) surrounded by the cover for gas to pass through, wherein each of the battery modules includes a battery cell stack in which a plurality of battery cells are stacked, a module frame accommodating the battery cell stack, and an end plate covering the battery cell stack exposed to each of two ends of the module frame, wherein the end plate includes at least one vent gate formed in the shape of a tube externally protruding from the end plate and communicating with the inside of the battery module, wherein the vent gate is disposed in the battery pack to face the outside of the battery pack, and is disposed in each of the two ends of the battery pack in the first direction to face the outside, wherein the cover of the horizontal beam includes at least one first connection hole opposite to one of the plurality of battery modules, wherein the vent gate is formed opposite to the at least one first connection hole for the vent gate and the horizontal beam to communicate with each other, wherein the cover (311, 321) of any one of the vertical beam and the horizontal beam includes a second connection hole formed at a portion where the vertical beam and the horizontal beam intersect with each other and communicating with the passage (312, 322) of any one of the vertical beam and the horizontal beam, and characterized in that the battery pack further comprises at least one burst portion formed on the outside of the horizontal beam and connected to the passage (312, 322).