The 2017–18 Biathlon IBU Cup was a multi-race tournament over a season of biathlon, organised by the International Biathlon Union. IBU Cup is the second-rank competition in biathlon after the Biathlon World Cup. The season started on 22 November 2017 in Sjusjøen, Norway and ended on 17 March 2018 in Khanty-Mansiysk, Russia. The defending overall champions from the were Alexey Volkov of Russia and Daria Virolaynen of Russia.