Patent ID: 7396042

Claim:
An airbag apparatus comprising; a gas generator for generating gas; and an airbag which is unfolded and inflated by the gas when the gas generator is operated, wherein the airbag includes an insertion opening through which the gas generator is inserted into the airbag, a panel sheet and a recess defined inwardly with respect to the airbag, the airbag formed by folding the panel sheet in two and sewing the circumference of the panel sheet, wherein the panel sheet has a first folding line for folding the panel sheet in two and an inward folding portion including a line extending from the first folding line and arranged in a circumferential portion of the panel sheet, wherein the inward folding portion has a second folding line by which the inward folding portion is defined and a third folding line that extends along the line extending from the first folding line, wherein the recess is provided by folding the inward folding portion alone the second folding line inwardly with respect to the airbag, folding the inward folding portion in two along the third folding line, and sewing the circumference of the inward folding portion together with the circumference of the panel sheet, a wherein the insertion opening is arranged in and sealed by the inward folding portion, wherein the gas generator includes a portion projecting from the airbag to the exterior through the insertion opening, and wherein the insertion opening is sealed by the inward folding portion and the projecting portion of the gas generator.