He was here to attend the session of Economy and Trade ministers of member-states of OIC Standing Committee on Economic and Commercial Cooperation (COMCEC), IRNA reported.
During the two-day event, Tayyeb-Nia met with Turkish president and development minister, ministers of economy and trade of Iraq and Afghanistan and head of Islamic Development Bank.
He also held a meeting with the Turkish businessmen and merchants.
In a separate meeting, he discussed issues of mutual interest with Iranian businessmen residing in Turkey.
The session started its work on Thursday in presence of ministers, officials and experts from 57 member states of COMCEC in Istanbul.
President Recep Tayyip Erdogan attended the opening ceremony of the session.
COMCEC was founded in 1981 and officially started its work in 1984.