Foi estudada a sudoração em pacientes com moléstia de Chagas crônica, mediante estímulo térmico (teste de Minor). As perdas hídricas dos pacientes chagásicos foram significativamente menores do que as dos pacientes não chagásicos.The sweating in patients with chronic Chagas' disease by using thermic stimulus (Minor test) is studied. The loss of water was significantly lower in the patients with Chagas' disease when compared with the loss in non chagasic patients.