In one approach, a secondary battery (10) includes two or more electrode groups (21,22). The negative electrode tabs (31a,34a) of one of the electrode groups (21,22) and the positive electrode tabs (32a,35a) of the other electrode group (21,22) are arranged in rows. The negative electrode tabs (34a) of one of the electrode groups (22) and the positive electrode tabs (32a) of the other electrode group (21) are arranged in rows . The positive electrode tabs (35a) of one of the electrode groups (22) and the negative electrode tabs (31a) of the other electrode group (21) is disposed at the other end in the second direction, and the other is disposed, at one end in the second direction, at a position different from those of the negative electrode tabs (34a) and the positive electrode tabs (32a).