The invention relates to an implant (1) for use in the occlusion of aneurysms in the region of vascular ramifications especially bifurcation aneurysms (A) comprising a mesh structure (3 4) which has the sections (a) to (d) when seen from proximal to distal: (a) a tapering proximal section in which the mesh structure runs into one or more coupling elements (10) (b) a fixing section in which the implant can be supported on a vascular wall (c) a permeable section for the region of the vascular bifurcation and (d) a distal section in which the implant is enlarged relative to section (b) and which is destined to be placed in the aneurysm (A) a zone of separation (T1 T2) being arranged in the region of sections (c) or (d).
