The exploitation of babassu palm tree in North and Northeast of Brazil generates jobs and incomes for about 300.000 families. The main product of this production chain is babassu oil. Many byproducts are generated and they have been used to low added value applications, such as animal feeding, fuel for seeds drying, coal, handcraft, between others. The fruit residues can be divided accordingly to the fruit part. Epicarp is lignocellulosic fibers rich. Mesocarp is starch rich, which contains a good fraction of antioxidant phenolic compounds. Both can be considered as interesting raw materials for polymeric blends, composites and nanocomposites, aggregating value to this chain production, increase the financial incomes of the local population. In this way, this study generates an important contribution to the Amazonian riverines. The production of babassu thermoplastic starch in a twin screw extruder and its blends with PBAT,poly (butylene adipate-co-terephthalate), was conducted and the mechanical and antioxidant properties of their films were evaluated, as well their morphologies. Since babassu TPS has a high amylose content, high viscosity was observed, being necessary to extrude the TPS in higher temperatures (up to 180oC) and higher plasticizer (glycerol ) contents, ca. 30wt%. It was possible to add up to 40 wt% of babassu TPS into PBAT. The films presented mechanical properties feasible for flexible packaging applications, as well good antioxidant activity. The scanning electrical microscopy (SEM) morphology evaluation indicated good dispersion and distribution of babassu TPS particles into PBAT matrix, with mostly submicrometric particle sizes.