Abstract: This study was carried out in accordance with identification of efficient feeding percent in fostering Macrobrachium nipponense. According to this study, 135 prawns, Macrobrachium nipponense with mean weight about 1.40±0.11 g were collected and randomly distributed in 9 tanks with 3 groups and 3 replicates. The first group prawns, with feeding 2% during a day, second group prawns with feeding 3% during a day and third group prawns with feeding 3% during a day were fed during 4 weeks. The value of definite food for each group was on average 2% of body weight during a day that was divided into number of feeding. Finally, prawns were weighed and weight growth, Feed Conversion Ratio, survival rate, special growth rate were calculated for each group. Results indicate utility of feeding 2% during a day (third group) that has a significant difference with other groups.