To provide carbon dioxide supply sheets for skin application and carbon dioxide supply sheet kits for skin application, which can efficiently and continuously supply carbon dioxide as a gas to the skin and which have excellent convenience and simpleness.SOLUTION: Provided is a carbon dioxide supply sheet for skin application which comprises a substrate sheet (X) with a carbon dioxide permeability at 25°C of 5000 cm/(m24H atm) or more, and is obtained by detachably laminating a gel sheet (Y) containing carbon dioxide on the opposite face to the face to be attached to the skin in the substrate sheet (X), the peel strength of the gel sheet (Y) being 0.01 N/cm or more to 2.5 N/cm or less.SELECTED DRAWING: None【課題】皮膚に二酸化炭素を気体のままで効率的かつ持続的に供給することができ、優れた利便性や簡便性を有する皮膚貼付用炭酸ガス供給シート、及び皮膚貼付用炭酸ガス供給シートキットに関する。【解決手段】25℃における炭酸ガス透過性が5000cm3/(m2・24h・atm)以上である基材シート(X)を備え、かつ基材シート(X)における皮膚に貼付する面とは反対側の面に、炭酸ガスを含有するゲルシート(Y)が着脱可能に積層されてなり、 ゲルシート(Y)のピール強度が0.01N/cm以上2.5N/cm以下である皮膚貼付用炭酸ガス供給シート。【選択図】なし