Secondary battery and method of manufacturing secondary battery

The present invention refers to a secondary battery (100) including an insulating bag (170) for preventing or substantially preventing a short circuit between an electrode assembly (110) and a case (120) and for improving efficiency in injecting electrolyte, and a method of manufacturing the secondary battery (100). A secondary battery (100) includes an electrode assembly (110) including a first electrode (111), a second electrode (112), and a separator (113) between the first (111) and second (112) electrodes; an insulating bag (170) accommodating the electrode assembly (110) and including a plurality of electrolyte communication holes (176) formed in a lower portion of the insulating bag (170); and a case (120) accommodating the electrode assembly (110) and the insulating bag (170).