The case of a 71-year-old man with aneurysms of bilateral profunda femoris arteries associated with socalled ''arteriomegaly'' is presented. Both aneurysms were resected and only the left lateral femoral circumflex artery was reconstructed. Atherosclerotic aneurysms of the profunda femoris artery are rarely encountered, but once diagnosed, surgical repair is generally recommended to avoid complications. However, there are no cases presenting with complications of diameters less than 2 cm; therefore, we suggest that a profunda femoris aneurysm over 2 cm in diameter is an indication for surgical treatment. If the superficial femoral artery is patent, ligation without reconstruction of the profunda femoris artery does not cause severe leg ischemia; so that in such cases, reconstruction of the profunda femoris artery is not necessary.