This report documents the MR appearance of bronchial atresia focused on its signal intensity. The signal intensity of the tubular dilated bronchi was isointense on Tl weighted image and hypointense on T2 weighted image as compared with the subcutaneous fat. Impacted materials in the bronchi were hemolysed blood clot mixed with mucus substance. Hypointensity on T2 weighted image which is contradictory to the signal intensity of previously reported cases with bronchial mucoid impaction might be due to T2 shortening effect of the undiluted methemoglobin. MRI not only showed the distal dilated bronchi clearly in multidirectional planes but also provided unique information about the endobronchial contents.