An 83-year-old man was presented to our institution for surgery for a pulsatile mass in his right femur. He was frail and suffered from advanced dementia. A computed tomography scan revealed bilateral PFAAs (profunda femoris artery aneurysms). The right PFAA had a maximum diameter of 82 mm and the left PFAA had a maximum diameter of 51 mm. The risk of rupture was considered high due to the giant aneurysm. Right PFAA ruptured during the surgical waiting period and underwent emergency endovascular treatment; VIABAHN stent graft was implanted. The left PFAA underwent elective endovascular treatment and a VIABAHN stent graft was implanted. Postoperatively, bilateral aneurysm shrinkage was achieved without complications.