Radioactive waste is the waste that is left out after the use of radioactive materials in nuclear reactors or during the production of nuclear weapons. Since, exploitation of radioactive materials was done on a large scale in the past few decades which resulted in production of tremendous amount of radioactive waste, radioactive waste management is a necessary step to deal with it. If not properly disposed, irradiation from radioactive waste will cause serious problems to humans and to the environment. While preparing this paper sincere effort was taken to give a succinct account of: (1) radioactive waste generation in different parts of the world. (2) Classification. (3) Processing. (4) Storage & (5) Treatment of radioactive waste.