Backward and Objective: The surgical technique depend on 2 physical laws may rule the ventral hernia physics and its repair. The first is Lapla’s Law, which describe the co- relation of intra-abdominal pressure (P) to the radius(r), tension (T) and thickness of ventral wall (M). This can be given away in following equation: P=TxM/r. this equation describe as the bigger the abdominal l wall radius and the thinner the wall the more tension to wall to induce of ventral hernia. The other law is Pascal’s Law; which statuses that any pressure increase on an enclosed fluid is transmitted undiminished through the fluid and acts equally in all directions. The aim Of this study was to show our experience in repair of ventral hernia by sublay polypropylene light weight mesh taking into account recurrence, complications, discomfort, cosmetic result, and patient satisfaction