Erdogan met President Mahmud Ahmadinejad and Vice President Parviz Davudi and was also expected to later meet Supreme Leader Ayatollah Ali Khamenei.
Erdogan said he was hoping for a near doubling of bilateral trade to $10 billion annually.
He also said the "sensitive situations" in Iraq, Israel and the Palestinian territories, and Lebanon would be discussed.
DIPLOMATIC OFFENSIVE: As the United States and the European Union increase pressure on Iran regarding its nuclear program, Tehran has launched a wide-ranging and ambitious diplomatic offensive, including high-level state visits with countries including China, Indonesia, Afghanistan, Azerbaijan, and Pakistan. In May, Iranian President Mahmud Ahmadinejad participated in a high-profile summit of the so-called Developing 8 (D8) group of countries in Bali. Below are some links to RFE/RL's coverage of Iran's efforts to boost international support for its position.
ARCHIVE To view all of RFE/RL's coverage of Iran, click here.