Tunisia’s religious affairs minister, a number of MPs and ambassadors of some of the participating countries were present at the ceremony.
Addressing the event, Ahmed Adhoum, the religious affairs minister, underlined the importance of holding Quran competitions and its role in enhancing Islamic unity.
He also urged efforts to counter incorrect interpretations of the Quran and to promote the culture of religious moderation.
More than 50 Quran memorizers and reciters from 23 countries are taking part in the competition, which will run until Friday.
Iran has two contenders, Seyed Mohammad Kermani in recitation and Mehdi Qashamlihaq in memorization.
On the sidelines of the opening ceremony, Iranian Cultural Attaché in Tunisia, Assadi Movahed, held a meeting with Adhoum, in which the two sides discussed promotion of Quranic activities and sharing experiences in the field.