Background:In recent years the respiratory tract diseases, including chronic bronchitis and others, are increasing, and all developed countrieshave already determined the normal Airway measurements. But there is a lack of the studies on normal tracheal and bronchial branches measurements, which could be serve as the control groups for the pathological ones. Thus the purpose of this study is to measure and identify tracheal tube and I-III bronchi of health Mongolian adults. Materials and Methods:The materials were developed by bronchography procedure, and histological methods; and the results assessed by hypothesis testing. Results: The trachea lenght for male was 120.54±4.07 mm; thebronchi length: right 1stbronchi as 28.00±3.04мм, the left - 42.79±2.18 mm, the 2ndbronchus - 25.99±1.38 mm, the 3th bronchus - 24.95±1.80 mm. The tracheal diameter for female was 17.95±2.27 mm; the bronchial diameter: 1stbronchus /right/ - 12.86±0.80 mm, the left - 11.44±0.60мм, the 2ndbronchus - 9.28±0.40 mm, the 3rdbronchus - 4.69±0.35 mm. Conclusion:The results show that the trachea and I-III bronchi length and diameter measurements’ differences are not statistically significant on gender, p=0.879 and p=0.669 separately.