Iranian and Brazilian Presidents, Mahmoud Ahmadinejad and Luiz Ignacio Lula da Silva signed eight bilateral agreements in areas such as mineralogy, geology, oil and gas, as well as in the investments and other spheres, Fars reported.
Trade turnover between Brazil and Iran amounted to $1bln in 2009.
Lula da Silva arrived in Tehran on Saturday evening to attend the G15 summit. He led a delegation of top officials, including ministers of defense, energy and deputy minister of economy.