Jabuticaba’s (Plinia cauliflora) peel represents about 50 % of the fruit mas and it is regarded as a residue. There is a great interest in the study of these residues due the high amounts of phenolic compounds with antioxidant capacity. The aim of the present study was to evaluate the chemical composition of the jabuticaba peel cultivated in two different cities in São Paulo state (Casa Branca and Joaquim Egídeo) and the antioxidant capacity of its hydroethanolic extract. The fruits were collected, cleaned and despolped. The peels were frozen, freeze-dried and then ground. Two extracts of each sample were done: one with 50% hydroethanolic solution (v/v) and another one 2% acidified (acetic acid, v/v/v). The freeze-dried peels were shaked with solvent for 1 hour, protected from light, and then filtered and stored in amber glass. Total phenolic, monomeric anthocyanins, H-ORAC and FRAP analysis were performed. The use of acidified solvent decreased the extraction of the phenolic compounds in Casa Branca samples from 65,47 to 58,30mg AGE/g dried sample and 63,49 to 63,08mg AGE/g of dried sample in Joaquim Egídeo sample. Monomeric anthocyanins decreased in the same way in both samples (6,54 to 6,07mg C3G/g of Casa Branca dried sample and 5,82 to 4,99 mg C3G/g of Joaquim Egídio dried sample). The sample from Joaquim Egídeo showed a statically different (p < 0,05) antioxidant capacity in comparison with the sample from Casa Branca. In conclusion, the kind of solvent employed in the extraction process have influence in the content of phenols and monomeric anthocyanins extracted.