The 2023–24 European Rugby Champions Cup is the tenth season of the European Rugby Champions Cup, the annual club rugby union competition run by European Professional Club Rugby (EPCR) for teams from the top five nations in European rugby and South Africa. It was the 29th season of pan-European professional club rugby competition.
This was the second time the tournament features the top teams from South Africa, following the second United Rugby Championship season.
The tournament commenced in May 2024. The final was held at Tottenham Hotspur Stadium in Tottenham, England on 25 May 2024, and won by Toulouse for the sixth time, defeating Leinster 31–22.