A stent-graft suitable for chimney grafting comprising a sheath and a tubular framework defining a lumen. The stent-graft comprises, at one end of the sheath, at least one bucket formed at the end so as to form a depression in the sheath able to mate with a collateral stent. The stent-graft is applicable to the treatment of vascular pathologies, in particular to treat aneurysms. More particularly, the stent-graft is an endoprosthesis designed to be placed in parallel with at least one other endoprosthesis.
