The present study was carried out to investigate the effect of using quinoa flour instead of 50(T2), 75(T3) and 100(T4) % of oat grain in goldfish rations on their performance. Ninety-six young goldfish, the age of about 5 months were randomly divided into four similar groups, twenty four goldfish in each group. The Total live weight gains for fish fed by the T1, T2, T3, and T4 diets were 7.56±0.70, 7.48±0.38, 7.97±1.20, and 7.32±0.68 g/day, respectively, during the trial. In this study, Insignificant (P>0.05) differences in specific growth rates (% / d) in experimental groups were observed during all experimental periods (60 days). In goldfish fed the T2, T3 and T4 diets was higher specific growth rates (% / d) than goldfish fed the goldfish by T1 diets (2.88%, 11.03%, and 11.71%;P>0.05) respectively. Furthermore, there were no significant differences between the control group and the groups that received quinoa flour on body length, body height, head highs or head widths. The performance of all goldfish fed quinoa rations showed as similar as goldfish fed by oat ration. On the basis of the results obtained in this study, quinoa flour can be successfully used in the goldfish ration without any negative effect on goldfish performance.