The aim of this study was to quantify the secondary metabolites of aqueous extract of root of Clerodendrum serratum. The root of Clerodendrum serratum was extracted by using water. The yield of aqueous extract was 10%w/w. The total phenolic, flavonoid, saponin and alkaloidal content determined by spectrophotometric method. The amount of total phenolic in extracts was determined in comparison with the gallic acid, whereas total flavonoid, saponin, alkaloid content was estimated corresponding to rutin, diosgenin and atropine respectively. The phenolic, flavonoid, saponin and alkaloidal content of aqueous root extract of Clerodendrum serratum were found to be 134.4mg/g, 67.67mg/g, 38.2mg/g and 12.67mg/g respectively. The presence of such important metabolites in C. serratum indicates its therapeutic importance in man and animal.