We describe a strategy for carotid artery reconstruction using synthetic graft. Case 1 is 69 year-old man who presented with right hemiparesis. Angiography showed left carotid artery occlusion and right carotid artery stenosis. The subclavian-carotid artery bypass was performed using a knitted double-velour collagen-impregnated graft (Hemashield). Case 2 is 61 year-old woman who presented with a cervical fist-sized mass. The left common carotid artery were encased by thyroid cancer. Radical tumor resection and carotid artery reconstruction were performed using a ringed