The floating venous thrombus in the common femoral vein has a high potential risk for pulmonary embolization. Clinical treatments, using anticoagulants or fibrinolytic, open thrombectomies, or thrombectomies by endovascular devices have all been used. Our case describe an obese patient affected by floating thrombus coming from GSV and diving in common femoral vein successful treated by combined both temporary vena cava insertion and open surgical thrombectomy.