We discussed the perioperative management in three patients with bronchial asthma who underwent thoracotomy. The management was as follows: 1. theophylline and steroid agents were preoperatively given till wheezing disappeared, 2. just before surgery, theophylline or beta-stimulator and steroid agents were given, 3. during surgery, aminophylline and steroid agents were given and bronchodilative anesthetics were inhaled, 4. steroid agents were postoperatively applied sufficiently so that signs due to bronchial asthma don't appear. Preoperative respiratory conditions improved with disappearance or decrease of wheezing, and resection of giant bulla and lobectomies with radical mediastinal lymph node dissection were safely possible with no evidence of the side effects due to steroid administration. The perioperative sufficient suppression of airway-tract hyperactivity is very important for thoracotomy in patients with bronchial asthma.