This study assessed the use of increasing levels of brown propolis extract (BPE) as a growth promoter in Nile tilapia ¢ngerling feeds. In a complete randomized design,75 Nile tilapia ¢ngerlings with 60 days on average and weighing 4.1 AE 0.1g were assigned to 25 aquaria (60 L) and subjected to 5 treatments in 5 repetitions for 30 days. Propolis from Serra do Araripe, Cariri Region, South Ceara Ł State^Brazil was used to produce the BPE. The treatments involved the addition of BPE to feed samples (0.91, 1.83, 2.74 and 3.65 g kg À 1 ) and feed control (without BPE). The ¢nal mean weight and the percentage of weight gain varied quadratically with the increase in BPE (Po0.01), with a maximum of 2.22 g kg À 1 . The other evaluated parameters were not a¡ected by the treatments (P40.05). The level of best performance parameters was 2.22 g kg À 1 , between the levels of 1.83 and 2.74 g BPE kg À 1 feed inclusion. These results indicate the potential to use the brown propolis extract as a growth promoter to Nile tilapia ¢ngerlings.