Patent ID: 6840535

Claim:
An airbag for a vehicle, comprising: an air cushion; an inflator that provides gas to the air cushion by generating gas; a first housing that accepts the inflator, having gas discharge holes that emits gas in sides opposite to each other; a retainer that fixes the air cushion on its upper surface, comprising a plurality of coupling parts each having a coupling hole corresponding to a respective one of the gas discharge holes in both sides, and coupled to the first housing to move up and down; a coupling device that couples the coupling part to the first housing; and a second housing that accepts the air cushion, coupled to an upper portion of the first housing, wherein the gas discharge holes are formed elongated in a upward and downward direction to permit the retainer to move up and down so that a portion of the respective gas discharge holes are opened by movement of the coupling part when spreading the air cushion, and the respective coupling holes keep the gas discharge holes closed by the coupled part when not spreading the air cushion by being arranged in a lower portion of the coupling part.