Air bag system

An air bag system that is capable of covering a front surface side of a front pillar of a vehicle and adapted to be installed in a front side door at a lower end side of the front pillar at a portion lying in proximity to a belt line, the air bag system comprising:

• the air bag;
• an inflator supplying an inflation gas into the air bag;
• a case comprising an projection opening for allowing the air bag to project from the case and adapted to store the air bag which is folded and the inflator;
• an air bag cover adapted to cover the projection opening in the case, having a door portion pushed to open by the air bag when the air bag inflates so as to allow the air bag which is inflating to project from the door portion and held on the case;
• and
• a mounting unit installed so as to extend from the case which holds the air bag, the inflator and the air bag cover for mounting the air bag system on an installing portion in the front side door;
• wherein an outer reinforcement for reinforcing an outer panel of the front side door is configured as a mounting portion in the front side door where the mounting unit is mounted, and wherein the air bag system is installed in the front side door by mounting the mounting unit at the mounting portion on the outer reinforcement by an opening in the outer panel.