The pistachio tree is an old tree with a great antiquity. There are many opinions about its origin; mostly know the internal area of IRAN as the original region that this tree has grown there for the first time. The historic signs about its antiquity show that thousand years before Christ its nut has been eaten as a food in Asia. After many years it introduced and carried to some other parts of world. Now Iran's pistachio is one of the best pistachios in the world. Naturally this situation causes that Iran gain considerable success and progress in different processes of sowing, fostering and harvesting of pistachio.