The present invention provides cyclic aminophenylalkanoic acid derivatives that act as agonists for human peroxisome proliferator-activated receptors (PPARs), in particular human PPAR.alpha. isoform, and are effective in the treatment of abnormal lipid metabolism, diabetes and other disorders. The present invention also provides addition salts of such cyclic aminophenylalkanoic acid derivatives and pharmaceutical compositions containing these compounds. Specifically, the present invention provides cyclic aminophenylalkanoic acid derivatives represented by the following general formula (1): ##STR00001## , or pharmaceutically acceptable salts thereof.