An implant (1) to be used for the occlusion of bifurcation aneurysms, with the implant (1) having an expanded state in which it is implanted in the blood vessel (Z) and a contracted state in which it is movable through the blood vessel (Z) and a proximal fixing section (3) a distal section (5) where the implant (1) is radially widened relative to the fixing section (3) and which is intended for placement in or in front of the aneurysm (A), and a transition section (4) located between the fixing section (3) and the distal section (5), wherein the implant (1). The implant is composed of interconnected or intersecting filaments (10) originating from the fixing section (3) or distal section (5) which meet centrally in the transition section (4), wherein the filaments (10) in the transition section (4) at least to some extent pass through a sleeve (7).
