PROBLEM TO BE SOLVED: To provide a water-soluble dietary fiber composition improved in the stability in the solution.SOLUTION: There is provided a stabilization method of a water-soluble dietary fiber in the solution and a production method of a stabilized water-soluble dietary fiber composition, the stabilization method and the production method including a step of letting a non-dietary fibrous monosaccharide and/or an oligosaccharide coexist in the water-soluble dietary fiber solution.COPYRIGHT: (C)2015,JPO&INPIT【課題】溶液での安定性が向上した水溶性食物繊維組成物の提供。【解決手段】非食物繊維性の単糖および/またはオリゴ糖を水溶性食物繊維の溶液中に共存させる工程を含んでなる、溶液中における水溶性食物繊維の安定化方法および安定化された水溶性食物繊維組成物の製造方法。【選択図】なし