A surgical implant (1) adapted for repairing a tissue or muscle wall defect comprises an areal, flexible basic structure which defines a primary region (4) and at least one arm (6) starting from the primary region (4) and having a free end and an end area extending up to the free end. The arm (6) is folded back and fixed (e.g. welded , sutured or glued), in its end area ,to the primary region (4) of the basic structure. Preferably , the basic structure (4 , 6) is made from one piece and comprises a mesh.
