The first plane Iran Air has purchased from French-Italian airplane manufacturer ATR is scheduled to arrive in Tehran next week, said Iran Air managing-director said on Monday.

There remains nearly six days to the final delivery of the first ATR plane to Iran, Farhad Parvaresh was quoted as saying by Irna.

Iran's national flag carrier signed a final agreement with ATR on April 13 for purchasing 20 passenger planes.

ATR is due to gradually deliver four of the newly-purchased planes to Iran in the near future, the official said.

Asked whether the four airplanes will be delivered at the same time, Parvaresh said it is not clear yet.