The invention is directed to a composition for preparing a carbon dioxide external preparation characterized by comprising a substance generating an acid after being hydrolyzed, a carbonate, a thickener and water as essential components, and a composition for preparing a carbon dioxide external preparation characterized by comprising the essential components above, a gelating agent being gelated by a calcium ion and a water-insoluble or poorly soluble calcium salt. According to the invention, the carbon dioxide external preparation, which contains sufficient amount of carbon dioxide, from which the carbon dioxide is absorbed transdermally or transmucosally in a sustained manner, and which has a more potent cosmetic or medical effect, can be easily prepared. In addition, the composition for preparing a carbon dioxide external preparation with a low cost can be provided.本發明係關於一種以可藉加水分解而生成酸之物質、碳酸鹽、增粘劑及水為必須成分之二氧化碳外用劑調製用組成物，及含有上述必須成分之外，尚含有可藉鈣離子凝膠化之凝膠化劑與非水溶性或難水溶性鈣鹽所組成之二氧化碳外用劑調製用組成物。依照本發明，可提供更容易調製成含有充分量之二氧化碳，且該二氧化碳能被持續經皮經粘膜吸收，因而可加強美容及醫療效果之二氧化碳外用劑，同時，可提供製造成本低廉之二氧化碳外用劑調製用組成物。
