The agreement contains live and time-shifted games coverage as well as highlights and news reports. Eurosport will show at least 20 games live including the opening match and the final game.
The coverage will also be available on OTT streaming service Eurosport Player for PCs, smartphones, tablets and connected TV sets.
On a non-exclusive basis, Eurosport will show the competition in neighbouring Austria, Switzerland, Luxembourg and Liechtenstein.
The Rugby World Cup 2015 will take place from September 18 to October 31 in England and Wales.