The present invention relates to an intraluminal vascular prosthesis (10； 60； 70) to be implanted into a blood vessel, comprising circles (12), which circles are arranged one after the other in the longitudinal direction of the prosthesis and consist of supports (13) that meander along the periphery thereof, and a prosthetic material (14) that is secured to the circles (12) and interconnects them. The prosthetic material comprises: at least one fenestrated portion (16) for forming at least one opening (22) for branches (20； 61, 62, 63) branching off, the prosthetic material (14) having a lower mesh density in the fenestrated portion (16) than in the remaining prosthetic material (14)； and lattice-like reinforcing elements (18).
