Heading a high-ranking parliamentary delegation, Larijani plans to leave Tehran for Geneva on Sunday and participate in the IPU Assembly.
He is also slated to deliver a speech in the session and meet with parliamentary delegations from other countries on the sidelines of the assembly.
An unprecedented 744 MPs from 141 countries, including 104 speakers and deputy speakers, are planned to attend the IPU Assembly from October 12 to 16.
They may adopt an emergency resolution on a pressing global issue, the official website of the IPU said, adding that current proposals include fighting terrorism and extremism, protecting the rights of the Palestinian people, addressing sovereign debt crises and combating human trafficking.