|Liposarcoma accounts for 5-6% of malignant tumors of the soft tissue. It is commonly seen in the limbs and retroperitoneum, but, primary liposarcoma of the liver is extremely rare. A 48-year-old women was presented to local hospital with mild headache. She was admited at neruosurgery. Coincidentally hepatic mass was founded. On physical examination, liver mass was palpable on right upper quadrant of abdomen. A CT scan showed a round tumor measuring 8cm with low density. MRI of the liver showed a high signal intensity on T1-weighted image and a high signal intensity on T2-weighted image in interlobal fissure. Liver biopsy was lipoma. During the surgery, the tumor was found to lie below liver. The mass was removed with liver wedge resection. A well circumscribed yellow mass. The resected specimen measured 85x75x70mm. Different histologic areas were separated by broad fibrous septa containing cells with enlarged hyperchromatic and atypical nuclei. Which was diagnosed as liposarcoma. In our case we thought liposarcoma was not originated in liver, glisson casule of liver was intact by pathologist, But mass was adhesive to glisson capsule of liver, which so performed segmentectomy of liver. Gallbladder was not seen in operation fields, But gallbladder was adhesived to liposarcoma on pathology and all layer of gallbladder was intact. In conclusion, our case was not originated fromliver and gallbladder. The origin was unknown. just as, liposarcoma was adhesived to liver and gallbladder.