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Posttraumatic aneurysms of the temporal artery are rare events and are generally pseudoaneurysms. Since the most frequent cause is blunt injury, all patients with a pulsating nodule in the region of the temporal artery should be investigated. This patient presented with a pulsating protuberance in the right frontal area with onset 4 months previously after being hit by a falling sharp object. Doppler ultrasonography showed evidence of aneurysmal dilatation, which was excised successfully. Pathology results demonstrated a true traumatic aneurysm of the superficial temporal artery. They occur because the superficial temporal artery is located directly over the periosteum, meaning it is very superficial. True posttraumatic aneurysms of the temporal artery are extremely rare and may be confused with many other conditions, such as lipomas and sebaceous cysts.