Benign metastasizing leiomyoma of uterus to the lung is a very rare disease and very interesting because of its histological benignity and clinically metastasizing characteristics. We recently encountered a 33-yr-old woman who was referred to our hospital because of bilateral multiple small nodular lesions on chest radiography. She had undergone myomectomy for myoma uteri at the age of 24. She underwent thoracoscopic tumor excision at left lung. The lesion was proved pathologically benign, and same as myoma uteri. Therefore we consider these lesions were pulmonary metastasis of myoma uteri. Myoma uteri has certain potential of metastasizing to the lung, in spite of benign disease. We report a rare case of benign metastasizing leiomyoma of uterus with a review of relevant literature.