The rocket was to have piggybacked a European weather satellite into orbit from Baikonur space center this week, but the launch was delayed on two occasions.
"As a result of negotiations between Director Anatoly Pemrinov and European Space Agency chief Jean-Jacques Dordain, who are currently at the Farnborough Airshow, it was decided to postpone the launch by at least two months," Igor Panarin said, adding there were no problems with the French-made MetOp satellite.
He said the French side related to the situation with understanding.
The first launch of the new Soyuz rocket was originally planned for July 17 and was later rescheduled for July 18 and then July 19.
The four-ton MetOp satellite is to be put into orbit for weather forecasting and climate monitoring. The planned launches of three MetOp satellites will cost 2.5 billion euros ($3.1 bln).
