| 摘要 |
A head-protection bag in which stress to be applied to circular connected portions during the inflation of the bag can be absorbed so as to prevent gas leakage at the circular connected portions is provided. The head-protection bag includes a window-side sheet, a cabin-side sheet, and a chamber which is formed between the sheets and by superposing the sheets on each other and sewing the sheets together. The sheets are connected to each other by line-shaped connected portions extending around their peripheries, line-shaped connected portions for subdividing the chamber, and circular connected portions for reinforcing areas around ends of the line-shaped connected portions. Each of the circular connected portions has a circular opening formed at the center thereof by cutting out the sheets.
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