PROBLEM TO BE SOLVED: To provide a prevention or improvement agent of overactive bladder, an ATP release inhibitor from a bladder epithelial cell, and a prevention or improvement agent of frequent urination, urinary urgency or urge urinary incontinence.SOLUTION: In a prevention or improvement agent of overactive bladder, an ATP release inhibitor, and a prevention or improvement agent of frequent urination, urinary urgency or urge urinary incontinence, at least one compound selected from the group consisting of perillic acid, limonene, myrtenic acid, myrtenol, myrtenal and α-pinene is an active ingredient.