The object of the present invention is to provide a compound which shows a strong analgesic effect on pain, especially neuropathic pain and fibromyalgia. The present invention provides a cyclic amine derivative or a pharmaceutically acceptable salt thereof represented by the following chemical formula:本發明之目的係提供一種對於疼痛,尤為神經障礙性疼痛及纖維肌痛症顯示強力鎮痛作用的化合物。本發明提供一種下述化學式所代表之環狀胺衍生物或其藥理學上可容許的鹽: