A 76-year-old woman with a growing tumor of the anterior chest wall was admitted to our hospital. This patient was diagnosed as having the malignant pleomorphic tumor using the needle biopsy and operated on. The operative procedure included wide resection of the tumor, associated excision of the major and minor pectoris muscle. The tumor size measured 10.5 x 5.8 x 5.5 cm and weighed 580 g. Histopathologically the tumor was confirmed to be poorly differentiated liposarcoma. While there was no invasion to the surrounding tissue, the local recurrence and metastasis wasn't confirmed for the past 7 months after the surgery. The major anatomic distribution of liposarcomas were retroperitoneum and lower extremities, and liposarcomas originating from the chest wall having been reported are only 7 cases of in Japan.