Benign chest wall tumours are very uncommon and chest wall lipomas are rarely reported in literature. We report herein a case of a 68-year old man who developed a giant, symptomless mass of the chest wall. A chest computed tomography scan evidenced a solid neoplasm measuring 27 cm in its major axis. A radical excision was performed and the histology was consistent with lipoma. To our knowledge, this is the first case reporting a giant lipoma of the chest wall with a thirty-year history.