PROBLEM TO BE SOLVED: To provide an absorbent article which can prevent a user from suffering skin irritation.SOLUTION: An absorbent article comprises: an absorber and an acid sheet which is arranged on a skin surface side of the absorber. The acid sheet carries a low water solubility acid compound particle of which average particle diameter is 30 &mum or less, and/or at least one part of constituent fibers of the acid sheet is covered with the low water solubility acid compound. The low water solubility acid compound does not dissolve at once but dissolve gradually when contacting with body fluid and the like, thereby preventing periphery of the portion where the acid sheet is arranged from being alkaline for a long time even after absorbing the body fluid and the like.
