Pouch-Type Secondary Battery

A pouch-type secondary battery includes: a first pouch having a first cup portion recessed in a first direction forming a first inner space, and a first edge portion extending from the first cup portion in a horizontal direction perpendicular to the first direction and surrounding a portion of the first cup portion; and a second pouch disposed to face the first pouch and including a second cup portion recessed in a direction opposite to the first direction forming a second inner space cooperating with the first inner space, and a second edge portion extending from the second cup portion in the horizontal direction to surround at a portion of the second cup portion and coupled to the first edge portion. The second inner space includes: an overlapping space overlapping the first inner space in the first direction, and an additional space in the horizontal direction and not overlapping the first inner space.