A vehicle air bag system includes a side air bag that is housed folded up in a vehicle seat and that deploys between an occupant seated in the vehicle seat and a front side door by receiving a supply of gas when a side collision occurs, and a curtain air bag that is housed folded up in an upper edge portion of a door opening and that deploys in a curtain shape downward by receiving a supply of gas when a side collision and a rollover occur. The curtain air bag has a delay chamber that deploys later than a main chamber by receiving a supply of gas from the main chamber via a narrowed passage. The delay chamber deploys with a lower end side below a beltline and in an area that overlaps with a deployment area of a side air bag.