A battery pack according to an embodiment of the present invention includes a battery assembly including a plurality of cell units, and a pack case that houses the battery assembly in an inner space, wherein each cell unit includes at least one battery cell and a cell cover that partially covers the at least one battery cell, and wherein the cell cover comprises a first cover part that covers one side surface of the at least one battery cell, a second cover part that covers the other side surface of the at least one battery cell, a third cover part that connects one end of the first cover part and one end of the second cover part, and blocking parts that are respectively formed at the other end of the first cover part and the other end of the second cover part, and block removal of the at least one battery cell.