Abstract: The aim of this study was to estimate technical, allocative and economical efficiency of selected fishermen in Hamoon Lake southeastern of Iran. Dataset applied in the study included cross sectional data that obtained from 74 questionnaires, completed among Sistanian fishermen in 2004. DEA approach is applied in this study. The use of the DEA index is free of distributional and production related assumptions in its derivations and is therefore not subject to the same potential for bias. The average technical efficiency of selected sample, using DEA approach, was calculated 82.7%. These figures for allocative and economic efficiencies were 75.5 and 62.7%, respectively. In addition, two components of technical efficiency including net technical efficiency and scale efficiency were calculated. Regarding that economic inefficiency results from both technical and allocative inefficiencies, so the harvests will perform economically efficient by rising technical and allocative efficiencies. Although, differences in efficiency among vessels were small in this study, vessels which their skippers participated in extension classes and those who did not have financial problem were more efficient. In addition, bigger capacity vessels technically and economically were more efficient.