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Purpose: To date, many previous studies on core muscle training have demonstrated its effectiveness on motor performance. This study was aimed to investigate the effect of abdominal core training on balance ability and pulmonary function for smokers. Methods: Eight healthy males (age: 24.75±6.60), smoking for more than three years participated in this study. Balance ability and pulmonary function were measured before and after 4-week intervention period and compared. The intervention was conducted twice a week during a total of 4 weeks Results: There was only significant change in expiratory minute ventilation (VE, P<.001), while balance ability and other pulmonary tests (expiratory and inspiratory vital capacities, expiratory reserve volume, inspiratory minute ventilation and tidal volume) did not showed significant changes. Conclusion: Through the results of this study, it was confirmed that abdominal core training had a preferential effect on respiratory function over balance ability, and in particular, a preferential change was found in exhalation rather than inhalation. Therefore, it was concluded that abdominal core training would be useful in patients with pulmonary disease.