To provide a hollowly woven air bag base fabric from which air bags can easily and accurately be produced without affecting the original properties of the air bags, in order to solve problems that handleability in post processes is deteriorated to give irregular air bag systems as products, when cutting-starting points and positions for attaching the air bags to inflators and automotive members are not marked, because the hollowly woven air bags are formed at a weaving stage, and to provide the air bag.

This hollowly woven air bag base fabric for forming bags bound by a hollow weaving method is characterized by using at least one yarn having a color different from the color of wefts constituting the air bag base fabric in wefts as the marking yarn for positioning.