He will arrive in Iran on April 5.
Santonja will be accompanied by Polish Federation President and IFBB Executive Pawel Filleborn.
The Spaniard will meet Iranian high-ranking sporting officials during his visit to the country.
The IFBB became a member of the Global Association of International Sports Federations in 1969.
The federation now has 199 affiliated nations and since 2006 has been led by Santonja.