The present invention relates to a staple bag having an outlet formed at a lower portion thereof and an inlet port formed at an upper portion thereof and having a fitting ring attached thereto and a fastening ring in which a through hole is formed at a central portion thereof, And a bonding pad attached to the human body, wherein the gas discharge port is provided in a gas discharging hole formed in the upper portion of the discharging port, the gas discharging port comprising a mounting portion and a mounting portion formed to protrude from the mounting portion And a second exhaust hole formed in the upper portion so as to communicate with the first exhaust hole, wherein the second exhaust hole is formed in the upper portion so as to be in communication with the first exhaust hole, wherein the attachment portion has a first exhaust hole formed opposite to the gas exhaust hole, And a gas outlet formed in the inside of the jaw portion at a predetermined height from the attachment portion along the periphery of the first exhaust hole.Further, in the present invention, the exhaust unit is characterized by a discharge mechanism for the superficial gas having a gas outlet including a filter in a space between the second exhaust hole and the inner jaw.In addition, in the present invention, the filter is characterized by a discharge device for the superficial gas discharge with a replaceable gas outlet.Therefore, according to the discharge mechanism for the superficial gas having the gas discharge port according to the preferred embodiment of the present invention, the gas from the superficial pocket can be discharged to the outside by the gas discharge port, thereby reducing the inconvenience incurred in the social activities of the patient There is an effect that can be.In addition, according to the discharge mechanism for a full-dressing provided with the gas discharge port according to the preferred embodiment of the present invention, a filter is provided in the gas d
