A six-year old boy presented with mycoplasmal pneumonia combined with recurrent pneumothorax. The patient had been treated with azithromycin and methylprednisolone for mycoplasmal pneumonia after admission, however his condition deteriorated. We increased the dosage of methylprednisolone and changed to erythromycin from azithromycin, his condition improved progressively. He presented pneumothorax twice during recovery phase. He was put on thoracic closed drainage and was cured. Pneumothorax is rare complication of mycoplasmal pneumonia. Here we reported the case to raise awareness of this condition.