Airbag Apparatus for Vehicle

An airbag apparatus for a vehicle includes a roof airbag device including a roof cushion mounted on a roof of a vehicle body and protruding toward a lower side of a vehicle compartment in a deployed state, a curtain airbag device including a curtain cushion mounted on the vehicle body around a side window to cover the side window in the deployed state, and a coupling unit configured to couple the roof cushion to be supported on the curtain cushion.