Gas venting device and battery pack comprising same

A gas venting device for a battery module or a battery pack, the gas venting device comprising:

• an inner bracket including a first through hole in a central portion through which gas in a battery module or a battery pack flows in;
• an outer bracket including a second through hole in a central portion connected to the first through hole of the inner bracket and including an inner wall of a discharge guide member forming a flow path through which inflowing gas is discharged to an outside, the inner wall being convex or concave;
• and
• a venting disk configured to shield the first through hole and the second through hole by allowing the inner bracket to be coupled to the outer bracket and to be broken when a predetermined pressure is applied,
• wherein the flow path has a truncated cone shape in which the cross-sectional area of the flow path continuously decreases toward the outlet portion.