"Iran can help (the international efforts) untie the present knot in the peace talks over Syria," Ban told reporters on Friday.
He underlined that the Iranian officials can use their influence to convince the Syrian official to have more constructive participation in the peace talks.
The UN secretary general pointed to the upcoming visit of Brahimi to Tehran, and said, "Brahimi's visit to Tehran and his consultations with Iranian officials on the Syrian crisis can be very useful and constructive."
Brahimi is slated to arrive in Tehran on Saturday on an official visit.
Brahimi is due to hold talks with senior Iranian officials on the latest developments in Syria.
On Wednesday, the "Friends of Syria Conference" was inaugurated in Tehran to discuss the latest developments in crisis-hit Syria and find diplomatic solutions to the ongoing bloodshed in there.
The gathering started work in the presence of heads of parliamentary foreign policy commissions of Iran, Algiers, Iraq, Syria, Lebanon and Russia to review ways to cease bloodshed and violation of human rights in Syria.
Resolutions of the Syrian crisis through diplomacy and immediate end to violation of human rights were the main topics of the gathering.
Syria has been experiencing unrest since March 2011 with organized attacks by well-armed gangs against Syrian police forces and border guards being reported across the country.
Tens of hundreds of people, including members of the security forces, have been killed, when some protest rallies turned into armed clashes.
The government blames outlaws, saboteurs, and armed terrorist groups for the deaths, stressing that the unrest is being orchestrated from abroad.
Tel Aviv, Washington, Ankara and some Arab capitals have been staging various plots to topple President Bashar al-Assad, who is well known in the world for his anti-Israeli stances.
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