The 2017–18 EIHL season was the 15th season of the Elite Ice Hockey League. The regular season commenced on 9 September 2017 and ended on 25 March 2018. The reigning league champions were the Cardiff Devils, who won the championship for the first time in 2016–17. The Devils retained their regular season title, with a 3–2 victory away at the Belfast Giants on 16 March 2018. The Devils also won the playoff title, beating the Sheffield Steelers – who had defeated the Devils 12 months prior in a 6–5 double overtime game – 3–1 in the final, winning a first playoff title since 1998–99.