PROBLEM TO BE SOLVED: To provide a prevention or improvement agent for overactive bladder which prevents and/or improves overactive bladder or dysuria such as urinary urgency and urge incontinence.SOLUTION: This prevention or improvement agent for overactive bladder includes as an effective component at least one kind selected from the group consisting of red cabbage (Brassicaoleracea L. var. capitata) extract, Yucca foam extract, stevia (Steviarebaudiana) extract, β-carotene, monascus yellow, garden thyme (Thymusvulgaris) extract, Carthamustinctorius extract, nootkatone (Nootkatone), mevastatin, and banana (Musaparadisiaca) extract.COPYRIGHT: (C)2013,JPO&INPIT【課題】本発明は、過活動膀胱、又は尿意切迫感、切迫性尿失禁等の排尿障害を予防及び/又は改善する、過活動膀胱の予防又は改善剤を提供する。【解決手段】アカキャベツ(Brassicaoleracea L.var.capitata)抽出物、ユッカフォーム抽出物、ステビア(Steviarebaudiana)抽出物、β-カロテン、ベニコウジ黄色素、タチジャコウソウ(Thymusvulgaris)抽出物、ベニバナ(Carthamustinctorius)抽出物、ノートカトン(Nootkatone)、メバスタチン(mevastatin)及びバナナ(Musaparadisiaca)抽出物からなる群より選ばれる少なくとも1種を有効成分とする、過活動膀胱の予防又は改善剤。【選択図】なし