PROBLEM TO BE SOLVED: To provide an effervescent tablet which can exhibit strong effervescence stably.SOLUTION: The invention provides an effervescent tablet having a laminated structure including two or more layers, in which a layer containing at least either of carbonate and hydrogen carbonate, and a layer containing organic acid are separated.SELECTED DRAWING: NoneCOPYRIGHT: (C)2016,JPO&INPIT【課題】 強い発泡性を安定的に発現できる発泡性錠剤を得ること。【解決手段】 二層以上の積層構造を有する錠剤において、炭酸塩と炭酸水素塩の少なくとも一方を含む層と、有機酸を含む層とを別の層とした発泡性錠剤である。【選択図】 なし