Intraosseous lipoma is a rare benign tumor of the bone, and it frequently occurs in the calcaneus and metaphyses of the long bones. It is usually identified as an incidental roentgenographic finding. Rare localizations such as mandibula, rib, fibula and fronthoethmoidal sinus have been described before. We report the first case of intraosseous lipoma of the patellar localization and discuss the radiologic features.