Uncaria tomentosa is a plant from the Southeast Americas; and underused for most rural population in the Amazonian region of Peru. However it could be better used for those very small farmers for improving poultry production and contribute to alleviate malnutrition and to substitute incomes coming from coca culture. The aim of this study was to determine the effect of atomized aqueous extract of Uncaria tomentosa (AAEUt) on the biochemical and hematological profiles and live performance parameters of broiler chickens. One hundred, one day old broiler chickens Cobb-500 were distributed into four treatments with 5 replicates each. The AAEUt was supplied for broiler chicken at 0 µg/ml, 525.15 µg/ml, 1050.3 µg/ml and 2100.6 µg/ml in the total drinking water for one to forty two day old. Biochemical profiles were measured at 21 and 42 day old and performance parameters were registered at 7, 21 and 42 days old. Total protein, hemoglobin, hematocrit profiles increased in relation with the increase of AAEUt level in drinking water (p<0.01). Albumin and ALT increased by the interaction between age and the AAEUt levels in the 42 days old chicken (p<0.01). Live performance parameters DFI, DWG and FCR did not change. It may be concluded AAEUt increased the levels of total protein, hemoglobin and hematocrit (p<0.01); indicating and improvement in broilers welfare, however, it did not was enough to influence on live performance parameters (p>0.05).