| Date | Time |
| Home | Score | Away | Venue | TV/Att |
|
| September 2011 |
| Fri 2 Sep | 19:05 |
| Ospreys | 27 - 3 | Leinster | Liberty Stadium | 5,424 | Report |
| Fri 2 Sep | 19:05 |
| Ulster | 28 - 14 | Glasgow | Ravenhill | 6,296 | Report |
| Fri 2 Sep | 19:30 |
| Edinburgh | 15 - 38 | Blues | Murrayfield | 2,431 | Report |
| Sat 3 Sep | 15:00 |
| Treviso | 9 - 11 | Connacht | Stadio di Monigo | 3,100 | Report |
| Sat 3 Sep | 19:45 |
| Munster | 20 - 12 | Dragons | Musgrave Park | 7,252 | Report | Video |
| Sun 4 Sep | 16:00 |
| Scarlets | 32 - 9 | Aironi | Parc y Scarlets | 6,493 | Report | Video |
| Fri 9 Sep | 19:30 |
| Glasgow | 12 - 23 | Munster | Firhill Stadium | 2,914 | Report |
| Fri 9 Sep | 19:35 |
| Leinster | 31 - 10 | Dragons | Royal Dublin Society | 14,362 | Report | Video |
| Sat 10 Sep | 15:00 |
| Aironi | 19 - 25 | Ulster | Stadio Zaffanella | 3,000 | Report |
| Sat 10 Sep | 15:15 |
| Connacht | 13 - 11 | Scarlets | Sportsground | 3,408 | Report | Video |
| Sat 10 Sep | 18:30 |
| Ospreys | 26 - 19 | Edinburgh | Liberty Stadium | 5,179 | Report | Video |
| Sun 11 Sep | 15:45 |
| Blues | 33 - 18 | Treviso | Cardiff City Stadium | 4,847 | Report | Video |
| Fri 16 Sep | 19:05 |
| Ulster | 20 - 3 | Blues | Ravenhill | 6,555 | Report | Video |
| Fri 16 Sep | 19:30 |
| Edinburgh | 19 - 14 | Connacht | Murrayfield | 2,364 | Report |
| Sat 17 Sep | 15:00 |
| Treviso | 27 - 32 | Ospreys | Stadio di Monigo | 3,000 | Report |
| Sat 17 Sep | 18:00 |
| Leinster | 19 - 23 | Glasgow | Royal Dublin Society | 14,686 | Report | Video |
| Sat 17 Sep | 18:30 |
| Dragons | 23 - 14 | Aironi | Rodney Parade | 4,197 | Report | Video |
| Sat 17 Sep | 19:45 |
| Munster | 35 - 12 | Scarlets | Musgrave Park | 7,648 | Report | Video |
| Fri 23 Sep | 19:05 |
| Blues | 13 - 18 | Munster | Cardiff City Stadium | 5,466 | Report | Video |
| Fri 23 Sep | 19:30 |
| Connacht | 17 - 13 | Dragons | Sportsground | 3,706 | Report |
| Fri 23 Sep | 19:30 |
| Glasgow | 13 - 15 | Treviso | Firhill Stadium | 2,864 | Report |
| Sat 24 Sep | 15:00 |
| Aironi | 25 - 19 | Edinburgh | Stadio Zaffanella | 2,500 | Report |
| Sat 24 Sep | 18:30 |
| Scarlets | 10 - 15 | Leinster | Parc y Scarlets | 8,823 | Report |
| Sun 25 Sep | 16:30 |
| Ospreys | 32 - 14 | Ulster | Liberty Stadium | 5,590 | Report |
| Fri 30 Sep | 19:05 |
| Dragons | 22 - 9 | Ulster | Rodney Parade | 4,554 | Report | Video |
| Fri 30 Sep | 19:30 |
| Edinburgh | 29 - 14 | Munster | Murrayfield | 3,467 | Report |
| Fri 30 Sep | 19:30 |
| Ospreys | 26 - 21 | Connacht | Liberty Stadium | 5,726 | Report |
| October 2011 |
| Sat 1 Oct | 15:00 |
| Treviso | 20 - 10 | Scarlets | Stadio di Monigo | 3,200 | Report |
| Sat 1 Oct | 18:00 |
| Leinster | 26 - 7 | Aironi | Royal Dublin Society | 14,920 | Report |
| Sat 1 Oct | 18:30 |
| Blues | 13 - 34 | Glasgow | Cardiff City Stadium | 8,198 | Report | Video |
| Fri 7 Oct | 19:05 |
| Scarlets | 33 - 17 | Edinburgh | Parc y Scarlets | 6,188 | Report | Video |
| Fri 7 Oct | 19:05 |
| Ulster | 12 - 23 | Treviso | Ravenhill | 7,372 | Report |
| Fri 7 Oct | 19:30 |
| Glasgow | 24 - 19 | Dragons | Firhill Stadium | 2,705 | Report |
| Sat 8 Oct | 15:00 |
| Aironi | 26 - 37 | Blues | Stadio Zaffanella | 3,000 | Report |
| Sat 8 Oct | 17:00 |
| Leinster | 30 - 20 | Connacht | Royal Dublin Society | 15,220 | Report |
| Sat 8 Oct | 19:30 |
| Munster | 13 - 17 | Ospreys | Thomond Park Stadium | 16,599 | Report | Video |
| Fri 28 Oct | 19:05 |
| Glasgow | 28 - 17 | Ospreys | Firhill Stadium | 3,443 | Report | Video |
| Fri 28 Oct | 19:35 |
| Edinburgh | 28 - 36 | Leinster | Murrayfield | 3,580 | Report |
| Fri 28 Oct | 20:30 |
| Munster | 18 - 6 | Aironi | Musgrave Park | 8,742 | Report |
| Sat 29 Oct | 15:00 |
| Treviso | 50 - 24 | Dragons | Stadio di Monigo | 4,700 | Report |
| Sat 29 Oct | 15:00 |
| Scarlets | 24 - 17 | Ulster | Parc y Scarlets | 7,075 | Report |
| Sat 29 Oct | 18:00 |
| Connacht | 20 - 26 | Blues | Sportsground | 3,996 | Report | Video |
| November 2011 |
| Fri 4 Nov | 20:00 |
| Leinster | 24 - 19 | Munster | AVIVA Stadium | 48,365 | Report |
| Sat 5 Nov | 14:30 |
| Aironi | 6 - 18 | Glasgow | Stadio Zaffanella | 2,200 | Report |
| Sat 5 Nov | 15:00 |
| Treviso | 11 - 22 | Edinburgh | Stadio di Monigo | 3,500 | Report |
| Sat 5 Nov | 17:35 |
| Ulster | 22 - 3 | Connacht | Ravenhill | 6,887 | Report |
| Sat 5 Nov | 18:30 |
| Ospreys | 9 - 9 | Scarlets | Liberty Stadium | 12,332 | Report | Video |
| Thu 24 Nov | 19:30 |
| Blues | 38 - 0 | Aironi | Cardiff City Stadium | 4,557 | Report | Video |
| Fri 25 Nov | 19:05 |
| Scarlets | 22 - 12 | Dragons | Parc y Scarlets | 7,950 | Report | Video |
| Fri 25 Nov | 19:35 |
| Glasgow | 17 - 9 | Ulster | Firhill Stadium | 3,940 | Report |
| Sat 26 Nov | 15:00 |
| Treviso | 20 - 30 | Leinster | Stadio di Monigo | 4,600 | Report |
| Sat 26 Nov | 18:30 |
| Connacht | 6 - 17 | Ospreys | Sportsground | 4,107 | Report | Video |
| Sat 26 Nov | 20:30 |
| Munster | 34 - 17 | Edinburgh | Thomond Park Stadium | 18,200 | Report |
| December 2011 |
| Fri 2 Dec | 19:05 |
| Ulster | 24 - 17 | Scarlets | Ravenhill | 8,117 | Report |
| Fri 2 Dec | 19:30 |
| Connacht | 13 - 15 | Treviso | Sportsground | 3,614 | Report |
| Fri 2 Dec | 19:30 |
| Edinburgh | 50 - 10 | Aironi | Murrayfield | 4,403 | Report |
| Fri 2 Dec | 20:05 |
| Leinster | 52 - 9 | Blues | Royal Dublin Society | 16,347 | Report |
| Sat 3 Dec | 18:30 |
| Ospreys | 19 - 13 | Munster | Liberty Stadium | 5,783 | Report | Audio |
| Sun 4 Dec | 16:30 |
| Dragons | 14 - 14 | Glasgow | Rodney Parade | 5,273 | Report |
| Fri 23 Dec | 19:00 |
| Aironi | 27 - 13 | Treviso | Stadio Zaffanella | 3,326 | Report |
| Fri 23 Dec | 19:35 |
| Blues | 28 - 9 | Dragons | Cardiff City Stadium | 10,660 | Report |
| Mon 26 Dec | 14:05 |
| Scarlets | 22 - 14 | Ospreys | Parc y Scarlets | 14,756 | Report |
| Mon 26 Dec | 17:30 |
| Leinster | 42 - 13 | Ulster | Royal Dublin Society | 18,500 | Report | Video |
| Mon 26 Dec | 17:35 |
| Edinburgh | 23 - 23 | Glasgow | Murrayfield | 13,246 | Report |
| Mon 26 Dec | 19:45 |
| Munster | 24 - 9 | Connacht | Thomond Park Stadium | 21,030 | Report |
| Fri 30 Dec | 19:05 |
| Dragons | 6 - 10 | Scarlets | Rodney Parade | 7,571 | Report |
| Fri 30 Dec | 19:05 |
| Ulster | 33 - 17 | Munster | Ravenhill | 11,379 | Report |
| Sat 31 Dec | 15:00 |
| Treviso | 37 - 14 | Aironi | Stadio di Monigo | 4,200 | Report |
| January 2012 |
| Sun 1 Jan | 17:00 |
| Connacht | 13 - 15 | Leinster | Sportsground | 6,582 | Report |
| Sun 1 Jan | 17:35 |
| Glasgow | 17 - 12 | Edinburgh | Firhill Stadium | 8,852 | Report | Video |
| Sun 1 Jan | 18:30 |
| Ospreys | 17 - 12 | Blues | Liberty Stadium | 11,186 | Report | Video |
| Fri 6 Jan | 19:05 |
| Dragons | 21 - 20 | Ospreys | Rodney Parade | 6,897 | Report | Video |
| Fri 6 Jan | 19:30 |
| Edinburgh | 20 - 42 | Ulster | Murrayfield | 3,792 | Report | Video |
| Sat 7 Jan | 16:35 |
| Aironi | 20 - 6 | Connacht | Stadio Zaffanella | 2,500 | Report |
| Sat 7 Jan | 18:15 |
| Blues | 19 - 23 | Leinster | Cardiff City Stadium | 9,390 | Report | Video |
| Sat 7 Jan | 18:15 |
| Scarlets | 16 - 14 | Glasgow | Parc y Scarlets | 9,869 | Report |
| Sat 7 Jan | 20:15 |
| Munster | 29 - 11 | Treviso | Thomond Park Stadium | 16,816 | Report | Video |
| February 2012 |
| Thu 9 Feb | 19:05 |
| Glasgow | 19 - 9 | Scarlets | Firhill Stadium | 2,665 | Report | Video |
| Thu 9 Feb | 19:05 |
| Leinster | 42 - 8 | Treviso | Royal Dublin Society | 15,648 | Report | Video |
| Fri 10 Feb | 19:05 |
| Ulster | 30 - 12 | Dragons | Ravenhill | 7,435 | Report |
| Fri 10 Feb | 19:30 |
| Blues | 22 - 15 | Connacht | Cardiff Arms Park | 8,000 | Report | Video |
| Fri 10 Feb | 19:35 |
| Edinburgh | 14 - 15 | Ospreys | Murrayfield | 3,209 | Report | Video |
| Fri 17 Feb | 19:05 |
| Blues | 21 - 14 | Ulster | Cardiff Arms Park | 8,600 | Report |
| Fri 17 Feb | 19:30 |
| Ospreys | 23 - 7 | Aironi | Liberty Stadium | 5,554 | Report |
| Fri 17 Feb | 19:35 |
| Leinster | 16 - 13 | Scarlets | Royal Dublin Society | 16,683 | Report |
| Sat 18 Feb | 16:15 |
| Treviso | 14 - 35 | Munster | Stadio di Monigo | 4,200 | Report |
| Sat 18 Feb | 17:30 |
| Connacht | 13 - 13 | Glasgow | Sportsground | 4,189 | Report |
| Sat 18 Feb | 18:30 |
| Dragons | 21 - 10 | Edinburgh | Rodney Parade | 5,130 | Report |
| Thu 23 Feb | 19:35 |
| Scarlets | 34 - 20 | Treviso | Parc y Scarlets | 6,594 | Report | Video |
| Fri 24 Feb | 19:05 |
| Munster | 16 - 13 | Blues | Thomond Park Stadium | 19,545 | Report | Video |
| Fri 24 Feb | 19:05 |
| Ulster | 15 - 14 | Ospreys | Ravenhill | 8,131 | Report |
| Fri 24 Feb | 19:30 |
| Connacht | 26 - 13 | Edinburgh | Sportsground | 4,324 | Report |
| Sat 25 Feb | 18:00 |
| Glasgow | 10 - 10 | Leinster | Firhill Stadium | 3,115 | Report | Video |
| Sun 26 Feb | 16:30 |
| Aironi | 9 - 10 | Dragons | Stadio Zaffanella | 2,712 | Report |
| March 2012 |
| Fri 2 Mar | 19:00 |
| Aironi | 6 - 22 | Leinster | Stadio Zaffanella | 2,100 | Report |
| Fri 2 Mar | 19:05 |
| Ospreys | 20 - 26 | Glasgow | Liberty Stadium | 5,782 | Report | Video |
| Fri 2 Mar | 19:05 |
| Ulster | 38 - 16 | Edinburgh | Ravenhill | 8,044 | Report |
| Fri 2 Mar | 19:30 |
| Scarlets | 38 - 10 | Connacht | Parc y Scarlets | 7,534 | Report |
| Sat 3 Mar | 16:30 |
| Treviso | 13 - 20 | Blues | Stadio di Monigo | 4,000 | Report |
| Sat 3 Mar | 18:30 |
| Dragons | 14 - 24 | Munster | Rodney Parade | 6,129 | Report |
| Sun 11 Mar | 15:00 |
| Aironi | 21 - 17 | Munster | Stadio Zaffanella | 3,000 | Report |
| Thu 15 Mar | 19:05 |
| Dragons | 18 - 14 | Blues | Rodney Parade | 7,821 | Report |
| Fri 23 Mar | 19:05 |
| Leinster | 22 - 23 | Ospreys | Royal Dublin Society | 18,300 | Report | Video |
| Fri 23 Mar | 19:30 |
| Edinburgh | 15 - 29 | Dragons | Murrayfield | 4,459 | Report |
| Fri 23 Mar | 19:35 |
| Glasgow | 29 - 6 | Aironi | Firhill Stadium | 4,110 | Report |
| Sat 24 Mar | 16:15 |
| Treviso | 23 - 27 | Ulster | Stadio di Monigo | 4,200 | Report |
| Sat 24 Mar | 18:30 |
| Blues | 14 - 26 | Scarlets | Cardiff City Stadium | 8,337 | Report | Video |
| Sat 24 Mar | 19:45 |
| Connacht | 16 - 20 | Munster | Sportsground | 7,022 | Report |
| Fri 30 Mar | 19:05 |
| Ulster | 45 - 7 | Aironi | Ravenhill | 10,125 | Report |
| Fri 30 Mar | 19:15 |
| Dragons | 19 - 27 | Connacht | Rodney Parade | 6,297 | Report |
| Fri 30 Mar | 19:35 |
| Edinburgh | 26 - 23 | Scarlets | Murrayfield | 2,969 | Report |
| Fri 30 Mar | 19:35 |
| Glasgow | 31 - 3 | Blues | Firhill Stadium | 4,224 | Report |
| Sat 31 Mar | 18:30 |
| Ospreys | 41 - 10 | Treviso | Liberty Stadium | 7,514 | Report | Video |
| Sat 31 Mar | 19:30 |
| Munster | 9 - 18 | Leinster | Thomond Park Stadium | 26,500 | Report | Video |
| April 2012 |
| Fri 13 Apr | 19:30 |
| Dragons | 32 - 33 | Treviso | Rodney Parade | 5,168 | Report |
| Fri 13 Apr | 19:45 |
| Leinster | 54 - 13 | Edinburgh | Royal Dublin Society | 16,224 | Report |
| Sat 14 Apr | 17:15 |
| Connacht | 26 - 21 | Ulster | Sportsground | 5,017 | Report |
| Sat 14 Apr | 18:30 |
| Blues | 12 - 33 | Ospreys | Cardiff City Stadium | 8,396 | Report |
| Sat 14 Apr | 19:15 |
| Munster | 35 - 29 | Glasgow | Musgrave Park | 7,942 | Report |
| Sun 15 Apr | 15:05 |
| Aironi | 23 - 26 | Scarlets | Stadio Zaffanella | 3,300 | Report |
| Fri 20 Apr | 19:05 |
| Ospreys | 31 - 12 | Dragons | Liberty Stadium | 14,478 | Report | Video |
| Fri 20 Apr | 19:05 |
| Ulster | 8 - 16 | Leinster | Ravenhill |
| Report |
| Sat 21 Apr | 17:00 |
| Connacht | 19 - 16 | Aironi | Sportsground | 5,216 | Report |
| Sat 21 Apr | 18:30 |
| Scarlets | 20 - 20 | Munster | Parc y Scarlets | 10,741 | Report | Video |
| Sun 22 Apr | 14:05 |
| Blues | 38 - 13 | Edinburgh | Cardiff City Stadium | 3,580 | Report | Video |
| Sun 22 Apr | 15:05 |
| Treviso | 8 - 13 | Glasgow | Stadio di Monigo | 4,200 | Report |
| May 2012 |
| Sat 5 May | 19:30 |
| Edinburgh | 44 - 21 | Treviso | Murrayfield | 2,855 | Report |
| Sat 5 May | 19:30 |
| Glasgow | 24 - 3 | Connacht | Firhill Stadium | 5,374 | Report |
| Sat 5 May | 19:30 |
| Munster | 36 - 8 | Ulster | Thomond Park Stadium | 19,362 | Report | Video |
| Sat 5 May | 19:30 |
| Dragons | 18 - 22 | Leinster | Rodney Parade | 8,038 | Report |
| Sat 5 May | 19:30 |
| Scarlets | 29 - 20 | Blues | Parc y Scarlets | 13,047 | Report | Video |
| Sat 5 May | 20:30 |
| Aironi | 11 - 18 | Ospreys | Stadio Zaffanella | 4,000 | Report |
| Fri 11 May | 19:35 | PO | Ospreys | 45 - 10 | Munster | Liberty Stadium | 10,026 | Report | Video |
| Sat 12 May | 19:35 | PO | Leinster | 19 - 15 | Glasgow | Royal Dublin Society | 15,113 | Report |
| Sun 27 May | 16:00 | F | Leinster | 30 - 31 | Ospreys | Royal Dublin Society | 18,500 | Report | Video |
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