An experiment has conducted to investigate the effect level of fermented banana peels by Rhyzopusoligosporus in ration to growth of broiler. The experiment was designed use Completely RandomizedDesign with four treatments: as a control ration (0% fermented banana peel); 5% fermented banana peel;10% fermented banana peel; 15% fermented banana peel, with four replicates. There were six ayampedagings a weeks with average weight 112.30 ± 2.74 g in each replicate. The result there was a 15%fermented banana peels in broiler ration was not significant (P>0,05) to feed consumption, but itsignificantly (P<0,01) effected gain, and feed conversion . Fermented banana peels by R. oligosporus couldbe used as much as 10% in broiler ration.