The prevalence of bronchial asthma in group with frequencies of resperatory infection in one year are 1, 2, 3, 4, 5, 6, 7, 8, ≥ 10 which are in turn to 11.1%, 18.6%, 20.4%, 33.3%, 40%, 45%, 50%, 61.5%, 64.3% (p < 0.001). Conclusion: The prevalence of bronchial asthma in primary school pupils at Go Vap district was 17.20% in 2007.