Talking to IRNA, Jahangiri said his visit was aimed at attending the mourning ceremony of Arbaeen in Iraq.
He arrived in the holy city of Najaf on Wednesday.
Upon arrival, he was warmly welcomed by a number of Iranian and Iraqi officials in Imam Ali (AS) airport.
The Arbaeen mourning ceremony is one of the largest religious gatherings in the world.
It marks the 40th day after the martyrdom anniversary of the grandson of Prophet Mohammad (PBUH), Imam Hossein (AS), and the third Imam of Shiite Muslims.
Over two million Iranian pilgrims have travelled to Iraq for Arbaeen Day through three border points including Mehran, Shalamcheh and Chazzabeh in southwestern Iran.
