An object of the present invention is to provide a method for industrially and efficiently producing a composition containing a rosaceae fruit sweetener containing mogrosides at a high concentration, exhibiting good sweetness quality, and excellent functionality such as antioxidant properties. The production method of the present invention comprises a step of extracting Rahan fruit with an aqueous solvent, and supplying the extract of Rahan fruit obtained in the extraction step to an immobilized enzyme membrane on which a proteolytic enzyme is immobilized, And allowing the immobilized enzyme membrane to permeate while decomposing the protein in the extract. [Selection figure] None【課題】モグロシド類を高濃度に含み、良好な甘味品質を呈し、抗酸化性などの機能性に優れた羅漢果甘味成分含有組成物を工業的に効率よく製造する方法を提供する。【解決手段】本発明の製造方法は、羅漢果を水系溶媒で抽出する工程と、前記抽出工程で得られた羅漢果の抽出液を、蛋白分解酵素を固定化した固定化酵素膜に供給して、該抽出液中の蛋白質を分解しながら、該固定化酵素膜を透過させる工程とを含む。【選択図】なし
