A quasi experimental research design was adopted for the study, 30 bronchial asthma patients were selected by using non probability convenient sampling technique at Melmaruvathur Adhiparasakthi Institute of Medical Sciences and Research, Melmaruvathur, Kancheepuram District. The data were collected by using demographic variables, structured interview schedule about bronchial asthma and modified Borg’s structured observation tool. The results revealed that the assessment and pretest mean were 63.1 with standard deviation of 8.72 and evaluation and post test mean were 83.7 with standard deviation of 9.23 for patients with bronchial asthma, statistically there was a significant improvement at P<0.05. The improvement score mean were 20.60 with the standard deviation of 4.10 and the obtained ’t’ value was 27.53. The calculated value was more than tabulated value so accepted hypothesis. Comparing the pretest and posttest values with demographic variables, the associations were more. So breathing exercise was effective among bronchial asthma patients.