The 2017–18 season is the fourth with Guinness as the title sponsor, the ninth with a Grand Final and the first season with 14 teams, following the admission of two South African teams.

The final was played at the Aviva Stadium in Dublin and saw Leinster defeat the Scarlets 40–32.

[1][2][3][4] The top side from each of the two conferences are given a bye to the semi-finals and have home advantage.

The play-offs are scheduled in the four weeks after the regular season has been completed.

Man of the Match: Johnny Sexton (Leinster) Touch judges: Marius Mitrea (Italy) Mike Adamson (Scotland Television match official: Neil Paterson (Scotland)