Chitin has dive in various forms of life (bacteria to higher plants and animals) as one of the most durable, richest biopolymers distributed widely in nature both in the terrestrial and marine environments. Chitinase are chitin degradable enzyme have control of phytopathogens, physiological functions and degradation of chitinous waste. Interest in chitin wastes utilization is increasing day by day because of its natural resistance against degradation. The review focused on different sources of naturally chitinase production in organisms was discussed.