The present invention provides an occlusion device for preventing blood flow from a blood vessel into an aneurysm through an opening in a blood vessel wall. The occlusion device includes an occluding sheet having a rolled configuration and a framework disposed with the occluding sheet and biased to unroll the occluding sheet. The present invention also provides a method of preventing blood flow from a blood vessel into an aneurysm using the occlusion device of the present invention.
