Heineken Cup champions Munster will be up against Cardiff Blues, Bourgoin and former holders Leicester Tigers in Pool Four when they open their defence of European club rugby's premier title in October.
The draw for the 2006/2007 tournament was made at Twickenham today (Wednesday June 21).
Biarritz Olympique, the French champions and beaten finalists at the Millennium Stadium a month ago, will play Northampton Saints, Overmach Rugby Parma and Border Reivers in Pool Six.
Pool 1: Benetton Treviso, Perpignan, London Wasps, Castres Olympique.
Pool 2: Edinburgh Gunners, Agen, Gloucester Rugby, Leinster.
Pool 3: Sale Sharks, Stade Francais Paris, Rugby Calvisano, Ospreys.
Pool 4: Cardiff Blues, Bourgoin, Leicester Tigers, Munster.
Pool 5: Ulster Rugby, Toulouse, London Irish, Llanelli Scarlets.
Pool 6: Biarritz Olympique, Northampton Saints, Overmach Rugby Parma, Border Reivers.
The first round of the tournament will be played on the weekend of 20/21/22 October with the fixtures for the early rounds due to be announced in the middle of July.