PROBLEM TO BE SOLVED: To provide a compound that has 5-HT2C receptor agonist activity and is useful as a therapeutic agent or a preventive agent for stress urinary incontinence.SOLUTION: The present invention provides an azepane derivative represented by the following formula or a pharmaceutically acceptable acid addition salt thereof.SELECTED DRAWING: None【課題】5-HT2C受容体作動活性を有する、腹圧性尿失禁の治療剤又は予防剤として有用な化合物を提供すること。【解決手段】本発明は、下記に代表されるアゼパン誘導体又はその薬学的に許容される酸付加塩を提供する。【選択図】なし