Subclavian artery aneurysms are uncommon; meanwhile, isolated subclavian artery aneurysms are extremely rare entities. There are limited number of reports on this abnormality, most of which are not well grounded.The patients presenting with subclavian artery aneurysms should be evaluated thoroughly for concurrent aneurysms. Herein, we presented a case of true aneurysm of the right subclavian artery with no associated abnormalities of other parts of vascular system or any predisposing factors, previously reported in cases with this condition.