The purpose of the present invention is to provide a compound that exerts a strong analgesic action against on pain, in particular, against neuropathic pain and/or fibromyalgia syndrome. Provided is a cyclic amine derivative represented by chemical formula or a pharmacologically acceptable salt thereof.提供一種化合物,其係對疼痛,尤其是對於神經病性(neuropathic)疼痛及/或肌纖維痛症顯示鎭痛作用。本發明係提供下述之化學式所代表的環狀胺衍生物或其藥理學上可容許的鹽。