The 2008–09 FIBA EuroChallenge was the sixth edition of Europe's third-tier level transnational men's professional club basketball FIBA EuroChallenge Tournament, and the first under the FIBA EuroChallenge name, organized by FIBA Europe. It was also the first season that eliminated teams from the ULEB Cup would transfer to a FIBA competition after the 2000 conflict between ULEB and FIBA. Additionally the formerly known ULEB Cup would be now renamed to EuroCup from 2008 and onwards.