The monkey will be sent into orbit in a capsule carried by the Kavoshgar-4 (or Explorer-4), rocket, which was test-launched with a monkey doll on board in mid-March.
Iran announced an ambitious space program in the mid-2000s. The country launched the Kavoshgar 1 rocket into space in February 2008.
The Kavoshgar 2 rocket, carrying a space lab and a restoration system, was launched in November 2008.
In February 2010, the Kavoshgar 3 rocket reportedly carried a test capsule with a rat, a turtle and worms into space.
Western powers suspect Iran of using its space program to develop ballistic missiles. Iran denies the allegations.