Pool B of the 2023 Rugby World Cup began on 9 September 2023 and concluded on 8 October 2023. The pool included holders and world-number-two ranked side South Africa, fellow automatic qualifiers and world-number-one-ranked side Ireland, and world-number-five-ranked side Scotland. They are joined by Romania and Tonga.^[1] It was widely referred to as the "group of death."^[2][3][4] Ireland topped the group and South Africa placed second, thus allowing both teams to progress.

More information Pos., Team ...

Pos.	Team	Band	Confederation	Method of qualification	Date of qualification	Apps.	Last	Previous best performance	World Rugby Rankings[5]
									1 January 2020[nb 1]	4 September 2023
B1	South Africa	1	Africa	Top 3 in 2019 RWC pool	8 October 2019	8th	2019	Winners (1995, 2007, 2019)	1	2
B2	Ireland	2	Europe	Top 3 in 2019 RWC pool	5 October 2019	10th	2019	Quarter-finals (1987, 1991, 1995, 2003, 2011, 2015, 2019)	5	1
B3	Scotland	3	Europe	Top 3 in 2019 RWC pool	12 October 2019	10th	2019	Fourth place (1991)	9	5
B4	Tonga	4[nb 2]	Oceania	Asia/Pacific 1	23 July 2022	9th	2019	Pool stage (1987, 1995, 1999, 2003, 2007, 2011, 2015, 2019)	13[nb 2]	15
B5	Romania	5[nb 3]	Europe	Europe 2	27 June 2022	9th	2015	Pool stage (1987, 1991, 1995, 1999, 2003, 2007, 2011, 2015)	19[nb 3]	19

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Notes

Ireland, ranked 1st in the world, began Pool B with a convincing win of 82–8 over Romania. Twelve tries were scored by eight different players, with only one having not been converted.^[7] The second match of the pool saw defending champions South Africa begin their defence against Scotland. South Africa won 18–3 courtesy of tries from Pieter-Steph du Toit and Kurt-Lee Arendse, along with two successful penalties from Manie Libbok.^[8] After a six day break, action in the pool returned as Tonga played their first match against Ireland, where the Irish continued their impressive start with a 59–16 victory, including eight tries.^[9] The next day, South Africa continued their strong start with an emphatic victory over Romania, in a 76–0 win with twelve tries, including a hat-trick of tries from Cobus Reinach and Makazole Mapimpi.^[10] On 23 September, 1st and 2nd in the world rankings Ireland and South Africa went head-to-head, the first time the teams had ever met at a World Cup, and the first time two sides ranked first and second in the world had met in a pool stage match. Ireland emerged victorious with a scoreline of 13–8 in a low-scoring and brutal affair in Saint-Denis, putting the Irish in pole position to top the pool.^[11] The next day, Scotland defeated Tonga in a bonus-point victory with a scoreline of 45–17 with seven tries to keep their hopes of progression to the knockout stage alive, while putting Tonga on the brink of elimination.^[12]

Going into the penultimate weekend of pool stage fixtures, four teams in the group still held their fate in their own hands. Leaders Ireland faced a bye week, while both Tonga and Scotland faced possible elimination if they lost their match. On 30 September, Scotland hammered Romania with a 84–0 scoreline, a result which officially eliminated Romania from the tournament. Twelve tries were scored by the Scots, including Darcy Graham who provided four of them and Ben Healy converting eleven of them. The result was crucial for Scotland in keeping their hopes of progression from the pool alive, and it left them only trailing South Africa in the standings from the head-to-head tiebreaker. It set up a showdown on the final matchday between Scotland and Ireland for a place in the knockout stage.^[13] The next day, South Africa played their final match of the pool as they moved to the brink of qualification to the quarter-finals after securing a 49–18 bonus-point victory over Tonga, a result that officially saw the elimination of the Sea Eagles from the tournament. Seven tries were scored by the Springboks, along with strong kicking from Handré Pollard and Manie Libbok. Ahead of the final matchweek, Ireland vs Scotland would be the deciding match as to who would finish in the top two and progress to the knockout stage.^[14]

In the final pair of matches in Pool B, Ireland and Scotland went head-to-head in Saint-Denis in a match that would officially decide the final standings of the two along with South Africa in the pool and who would progress to the knockout stage with all three sides still able to do so. A clinical Ireland ended up coming away with a 36–14 bonus-point victory over the Scots with six tries, including a try from James Lowe inside 70 seconds, to ensure that Ireland qualified as they topped Group B, South Africa qualified in second and Scotland suffered elimination from the tournament as they finished third, but qualified for the 2027 Rugby World Cup.^[15] The final match of Pool B took place the following day between Tonga and Romania in Villeneuve-d'Ascq with both sides already confirmed to finish outside of the top three. Tonga came out with a 45–24 bonus-point victory over the Romanians with two tries from Solomone Kata helping push the Tongans to the win and end their World Cup campaign with a victory as they finished fourth in the pool while ending a miserable campaign for Romania who finished fifth with no victories.^[16]