A gas measuring apparatus for a secondary battery, the gas measuring apparatus comprising: a chamber intended to accommodate a secondary battery therein; a heater unit configured to apply heat to the chamber to ignite the secondary battery accommodated in the chamber; a collection tube connected to the inside of the chamber to collect a gas generated in the secondary battery; a vacuum unit connected to the collection tube to vacuumize the inside of the chamber so as to introduce the gas into the collection tube; and a gas measuring unit configured to measure an amount of gas introduced into the collection tube, wherein the chamber comprises: a main body comprising an accommodation part having an opened one side to accommodate the secondary battery; a cover covering the one side of the main body to seal the accommodation part; a sealing member provided between the main body and the cover to seal a gap between the main body and the cover, characterized in that the main body has an end in which an accommodation groove accommodating the sealing member is formed; and a cooling means configured to cool the sealing member to prevent the sealing member from being damaged by the heat, wherein the cooling means comprises: an inlet nozzle through which coolant is introduced into the accommodation groove; and an outlet nozzle through which the coolant is discharged from the accommodation groove. a chamber intended to accommodate a secondary battery therein; a heater unit configured to apply heat to the chamber to ignite the secondary battery accommodated in the chamber; a collection tube connected to the inside of the chamber to collect a gas generated in the secondary battery; a vacuum unit connected to the collection tube to vacuumize the inside of the chamber so as to introduce the gas into the collection tube; and a gas measuring unit configured to measure an amount of gas introduced into the collection tube, wherein the chamber comprises: a main body comprising an accommodation part having an opened one side to accommodate the secondary battery; a cover covering the one side of the main body to seal the accommodation part; a sealing member provided between the main body and the cover to seal a gap between the main body and the cover, characterized in that the main body has an end in which an accommodation groove accommodating the sealing member is formed; and a cooling means configured to cool the sealing member to prevent the sealing member from being damaged by the heat, wherein the cooling means comprises: an inlet nozzle through which coolant is introduced into the accommodation groove; and an outlet nozzle through which the coolant is discharged from the accommodation groove. a main body comprising an accommodation part having an opened one side to accommodate the secondary battery; a cover covering the one side of the main body to seal the accommodation part; a sealing member provided between the main body and the cover to seal a gap between the main body and the cover, characterized in that the main body has an end in which an accommodation groove accommodating the sealing member is formed; and a cooling means configured to cool the sealing member to prevent the sealing member from being damaged by the heat, wherein the cooling means comprises: an inlet nozzle through which coolant is introduced into the accommodation groove; and an outlet nozzle through which the coolant is discharged from the accommodation groove. an inlet nozzle through which coolant is introduced into the accommodation groove; and an outlet nozzle through which the coolant is discharged from the accommodation groove.