THREE-DIMENSIONAL AIR BAG

A three-dimensional air bag includes a first three-dimensional sewn portion, a second three-dimensional sewn portion and a flat sewn portion as defined herein, a shape of the first three-dimensional sewn portion in the main panel in a flat state is different from a shape of the first three-dimensional sewn portion in the first side panel in a flat state, a shape of the second three-dimensional sewn portion in the main panel in the flat state is different from a shape of the second three-dimensional sewn portion in the second side panel in a flat state, and a shape of the flat sewn portion in the first side panel in the flat state and a shape of the flat sewn portion in the second side panel in the flat state are same.