The S-5 is a rocket weapon developed by the Soviet Air Force and used by military aircraft against ground area targets. It is in service with the Russian Aerospace Forces and various export customers. It is based on the R4M, a German design from World War 2.

In military terminology, a rocket is a self-propelled, unguided or guided, weapon-system powered by a rocket engine. Though used primarily as medium- and long-range artillery systems, historically rockets have also seen considerable use as air-to-surface weapons, some use as air-to-air weapons, and even as surface-to-air devices. Examples of modern surface-to-surface rocket systems include the Soviet BM-27 Uragan and the American M270 Multiple Launch Rocket System.