The present invention at a low cost, to provide the user easy to handle external preparation for skin. A skin external preparation of the present invention, at least, met at the effervescent skin external preparation having a solid acidic substance, and solid carbon dioxide gas generating material that generates carbon dioxide gas reacts with the acidic substance Te, In addition, a polysaccharide or a derivative thereof at least one type contains, is mixed with the water-containing material at the time of use of the external preparation for skin.BACKGROUND【課題】低コストで、使用者が取り扱いやすい皮膚外用剤を提供すること。【解決手段】本発明の皮膚外用剤は、少なくとも、固体状の酸性物質と、該酸性物質と反応して炭酸ガスを発生する固体状の炭酸ガス発生物質とを有する発泡性皮膚外用剤であって、更に、多糖類又はその誘導体を少なくとも1種類含有し、前記皮膚外用剤の使用時に含水物質と混合する。【選択図】なし
