SECONDARY BATTERY CASE AND SECONDARY BATTERY

The secondary battery case accommodates an electrode assembly having a structure in which electrodes and separators are alternately arranged, the secondary battery case including a first cup having a recessed shape, a second cup having a recessed shape and provided on one side of the first cup, a first peripheral portion surrounding a perimeter of the first cup when the secondary battery case is unfolded, and a second peripheral portion surrounding a perimeter of the second cup when the secondary battery case is unfolded. The first peripheral portion includes a first cup-corresponding peripheral portion that corresponds to a width of the first cup, and the second peripheral portion includes a second cup-corresponding peripheral portion that corresponds to the second cup. When viewed in a cross-sectional view in which the width of the first cup is shown, the width of the first cup is greater than a width of the first cup-corresponding peripheral portion.