Secondary battery

A secondary battery comprising a power generation element including a plurality of electrodes, the electrodes being stacked on each other in a stacking direction with a separator interposed therebetween, wherein

• each of the electrodes includes a current collector led out in a first direction intersecting the stacking direction,
• each of a plurality of the current collectors led out in the first direction includes an end part, wherein the end part includes a first bent part that is bent in a second direction intersecting the first direction,
• each of a plurality of the first bent parts overlaps and is in contact with an adjacent first bent part in the second direction,
• at least one of the first bent parts terminates at a middle point on an end face along the second direction of the power generation element, and
• wherein the end part of each of one or more, but not all, of the current collectors led out in the first direction further includes a second bent part that is coupled to the first bent part and bent in a third direction to be along the power generation element, and wherein the third direction is opposite to the first direction.