<p>A membrane-covered stent (1 and 6). At least one end-portion of the membrane-covered stent (1 and 6) is connected to a bare stent (2 and 7). The bare stent (2 and 7) allows an outwardly expanded end-portion of the membrane-covered stent (1 and 6) to be drawn in, thus preventing the end-portion of the membrane-covered stent (1 and 6) from tilting. The bare stent (2 and 7) allows for clearing of a blocked aorta under the premise of not blocking intrathoracic branch blood vessels, and allows for expansion a rivet area of the stent under the premise of not blocking the branch blood vessels.</p>
