[Problem] A compound, which can be used for preventing or treating diseases, in which 11²-hydroxysteroid dehydrogenase type 1 (11²-HSD1) is concerned, in particular, diabetes, insulin resistance, dementia, schizophrenia and depression, is provided. [Means for Solution] It was found that a triazole derivative, in which one of the 3- and 5-positions of the triazole ring has (di)alkylmethyl or cycloalkyl, each of which is substituted with -O- (aryl or a heterocyclic group, each of which may be substituted, or lower alkylene-cycloalkyl), and the other thereof has aryl, a heterocyclic group or cycloalkyl, each of which may be substituted, or a pharmaceutically acceptable salt thereof exhibits potent 11²-HSD1 inhibitory action. From the above, the triazole derivative of the present invention can be used for preventing or treating diabetes, insulin resistance, dementia, schizophrenia and depression.
