The present invention relates to a composition for the treatment and improvement of diabetes comprising caveolin as an active ingredient and a method for treating diabetes using the same, more precisely a composition comprising caveolin-1 as an active ingredient for the treatment and improvement of type II diabetes which is age-dependent but not showing obesity symptom and a method for treating diabetes using the same. The treatment method and composition of the present invention is very effective in improving and treating diabetes by regulating insulin sensitivity by increasing caveolin level in muscle tissues of type II diabetes patient which is age-dependent but not showing obesity symptom.
