PROBLEM TO BE SOLVED: To provide a preventive or improver for overactive bladder which prevents or improves overactive bladder.SOLUTION: A preventive or improver for overactive bladder includes at least one compound selected from the group consisting of compounds represented by formulae (1)-(4) as an active ingredient.COPYRIGHT: (C)2014,JPO&INPIT【課題】過活動膀胱を予防又は改善する、過活動膀胱の予防又は改善剤を提供する。【解決手段】下記式(1)~(4)で表される化合物からなる群より選ばれる少なくとも1種の化合物を有効成分とする、過活動膀胱の予防又は改善剤。【選択図】なし