PROBLEM TO BE SOLVED: To provide a foamable bag material that makes it possible to apply carbon dioxide to a target site effectively.SOLUTION: A foamable bag material contains a nonwoven fabric sheet that reacts with water to generate carbon dioxide, and a hydrophobic sheet positioned outside the nonwoven fabric sheet.SELECTED DRAWING: Figure 1【課題】炭酸ガスを被適用部位に効果的に適用可能な発泡性袋材の提供。【解決手段】水に反応して炭酸ガスを発生する不織布シートと、前記不織布シートの外側に位置する疎水性シートと、を備える発泡性袋材。【選択図】図1