The Leader inaugurated the event by addressing the conference.
Ayatollah Khamenei on Tuesday morning paid tribute to the memorial of martyrs of Palestinian Intifada upon arrival.
The 6th International Conference on Palestinian Intifada is being held with participation of 80 delegations from different world countries.
700 foreign guests and representatives of the pro-Palestinian organizations have attended the Tuesday conference in Tehran.
The international conference on supporting the Palestinian Intifada will end with President Hassan Rouhani's speech and a statement will be released at the closing ceremony.