The invention relates to an implant (1) for use in the occlusion of aneurysms (A) in blood vessels (Z) in the region of vascular ramifications (X, Y), in particular bifurcation aneurysms, wherein the implant (1) is present in an expanded state in which the implant is implanted in the blood vessel (Z) and in a contracted state in which the implant is movable through the blood vessel (Z). The implant (1) has a proximal fixing section (3), by which the implant (1) can be fixed to a vessel wall of the blood vessel (Z), a distal section (5), in which the implant (1) is radially expanded in relation to the fixing section (3) and which is intended for positioning in or before the aneurysm (A), and a transition section (4) between the fixing section (3) and the distal section (5). The implant (1) is made up of filaments (10) which are connected to one another or intersect, and in the transition section (4) one or more filaments (10) coming from the fixing section (3) or distal section (5) come together centrally, and the filaments (10) in the transition section (4) extend at least partially through a sleeve (7). In this way a particularly flexible implant (1) is provided, the distal section (5) of which can adapt well even to irregular forms of aneurysm.
