The purpose of the present invention is to provide a novel compound which has retinoid-related orphan receptor [gamma] antagonist activity and which exhibits a therapeutic effect or a preventive effect against autoimmune diseases such as psoriasis or alopecia areata, or allergic diseases such as allergic dermatitis. A cyclic amine derivative represented in the expression or a pharmaceutically acceptable salt thereof is provided.本發明係以提供一種新穎化合物作為目的，該新穎化合物具有類視色素相關孤兒受體γ(retinoid-related orphan receptor γ)拮抗劑活性，而對乾癬或斑禿等之自體免疫疾病、或過敏性皮膚炎等之過敏性疾病發揮治療效果或預防效果。本發明提供一種下述所代表之環狀胺衍生物或其藥理學容許鹽。
