A degassing apparatus of a secondary battery, the degassing apparatus comprising: a drive motor; and a jig arm (110, 120) configured to pressurize a first surface of a gas pocket of the battery cell and a second surface of the gas pocket opposite to the first surface by controlling a space within the jig arm (110, 120) by the drive motor, wherein an inside of the jig arm (110, 120) comprises: a piercing unit including a through member configured to form a through hole in the gas pocket; a sealing unit (113, 123) configured to seal a periphery of the through hole formed by the through member; and a pad unit (114, 124) surrounding the sealing unit (113, 123), the pad unit (114, 124) being configured to block an inflow of external gas and moisture into the through hole when in contact with the gas pocket; and a vacuum forming unit configured to suck air inside an area enclosed by the pad unit (114, 124) when in contact with the gas pocket, characterized in that the jig arm (110, 120) includes a pair of arms extending from the drive motor, the arms being arranged to face each other, and wherein the sealing unit (113, 123) and the pad unit (114, 124) are respectively formed in a shape corresponding to each other on the pair of arms. a drive motor; and a jig arm (110, 120) configured to pressurize a first surface of a gas pocket of the battery cell and a second surface of the gas pocket opposite to the first surface by controlling a space within the jig arm (110, 120) by the drive motor, wherein an inside of the jig arm (110, 120) comprises: a piercing unit including a through member configured to form a through hole in the gas pocket; a sealing unit (113, 123) configured to seal a periphery of the through hole formed by the through member; and a pad unit (114, 124) surrounding the sealing unit (113, 123), the pad unit (114, 124) being configured to block an inflow of external gas and moisture into the through hole when in contact with the gas pocket; and a vacuum forming unit configured to suck air inside an area enclosed by the pad unit (114, 124) when in contact with the gas pocket, characterized in that the jig arm (110, 120) includes a pair of arms extending from the drive motor, the arms being arranged to face each other, and wherein the sealing unit (113, 123) and the pad unit (114, 124) are respectively formed in a shape corresponding to each other on the pair of arms. a piercing unit including a through member configured to form a through hole in the gas pocket; a sealing unit (113, 123) configured to seal a periphery of the through hole formed by the through member; and a pad unit (114, 124) surrounding the sealing unit (113, 123), the pad unit (114, 124) being configured to block an inflow of external gas and moisture into the through hole when in contact with the gas pocket; and a vacuum forming unit configured to suck air inside an area enclosed by the pad unit (114, 124) when in contact with the gas pocket, characterized in that the jig arm (110, 120) includes a pair of arms extending from the drive motor, the arms being arranged to face each other, and wherein the sealing unit (113, 123) and the pad unit (114, 124) are respectively formed in a shape corresponding to each other on the pair of arms.