Abstract
It has been thought that iatrogenic pneumothorax due to acupuncture is generally rare. But actually it does not seem rare accident. We have met 4 accidental pneumothorax cases in our clinic between 1987 and 1993. In this term 2147 patients had acupuncture therapy. And 749 of these patients had acupuncture in their thoracic cage. The incident rate of pneumothorax is 0.53% of 749 patients. Three pneumothorax cases had to be hospitalized to have care and obserbation. Therefore the iatrogenic pneumothorax should not be ignored and it should be avoided by careful, thoughtful therapeutic technic.