A Baker cyst is the most common mass around the knee joint. It is mostly asymptomatic; however, it may cause knee pain or focal swelling because of compression of vein or nerve. Herein, we report a case of Baker cyst obstructing arterial flow and causing intermittent claudication. An attached polycystic mass was found posterior to the popliteal artery. Needle aspiration was ineffective, and the patient experienced recurrent lower leg pain. Surgical resection was performed, and the patient became symptom free. Baker cyst may cause lower limb ischemia through obstruction of arterial flow, requiring surgical intervention.