Abstract: A fabric prosthetic unit for repairing an incissional hernia including a joining strip is intended to be positioned in a space created by a tear or collapse of an aponeurosis. Two substantially planer sheets of colonisable flexible prosthetic fabric material extend substantially parallel to each other and are linked together by the joining strip. Each of the planer sheets includes flap extensions lying opposite to each other and are on either side of an edge part of a corresponding face on the joining strip.