SEAT AIRBAG FOR VEHICLE

Disclosed is a seat airbag for a vehicle, the seat airbag including an airbag cushion including lateral cushions configured to be deployed forward from lateral sides of a seatback, and front cushions bent and extending from front ends of the lateral cushions toward a seat center and positioned at a front side of the passenger, and support tethers configured to connect upper portions of the front cushions and an upper portion of the seatback or connect lower portions of the front cushions and a lower portion of the seatback so that the front cushions support a passenger when the passenger is loaded onto the front cushions.