The 2017–18 Trans-Tasman Tri-Series was a Twenty20 International (T20I) cricket tournament that was held in Australia and New Zealand in February 2018. It was a tri-nation series between Australia, England and New Zealand. It followed on from England's tour of Australia, which included the 2017–18 Ashes series, and took the place of the planned Chappell–Hadlee Trophy series. It was the first T20I tri-series contested by full ICC members.