A novel benzenesulfonamide derivative represented by the formula: ##STR1## has an inhibitory activity against phospholipase A.sub.2, so that it is effective in the treatment of diseases for which such an activity is efficacious.
A novel benzenesulfonamide derivative of formula (I) which has an action of inhibiting phospholipase A2 and therefore is effective in treating diseases for which this action is used to advantage.