This study aims to manage shell and shell waste from fishery products into chitosan. The processing was carried out by isolating and characterizing chitosan from the shells of vaname shrimp (Litopenaeus vanname), the shells of the coral crab (Charybdis ferryatus) and the shells of the freshwater lobster (Cherax quadricarinatus). The isolation method was carried out in several stages starting with demineralization, deproteination, depigmentation, deacetylation and then the characterization of the isolated chitosan. Characterization includes determining the degree of deacetylation, yield percentage, and absorption analysis of the isolated chitosan functional group using Fourier Transform Infrared (FT-IR) spectrophotometry. The isolation results obtained chitosan from vaname shrimp shell waste, coral crab shells and freshwater crayfish shells with a degree of deacetylation (%) of 82.84±0.13; 82.84±0.13; and 67.84±0.05. Chitosan from the isolation of vaname shrimp shell waste, coral crab shells is in accordance with the Standard National Indonesian (SNI) quality, while chitosan from freshwater crayfish shell waste is not suitable