Abstract: The present invention relates to a stent (1) suitable for chimney grafting comprising a sheath (2) and a tubular framework (3) defining an aperture (19), characterized in that it comprises, at one end of the sheath (2), at least one bucket (4) formed toward said end so as to form a depression in said sheath (2) able to mate with a collateral stent (10). The invention is applicable to the treatment of vascular pathologies, in particular to treat aneurysms. More particularly, the stent according to the invention is an endoprosthesis designed to be placed in parallel with at least one other endoprosthesis.