OSTRAVAR Aréna (previously ČEZ Aréna, due to sponsorship reasons) is an indoor arena used mainly for ice hockey matches, in Vítkovice, Ostrava, Czech Republic. It opened in 1986, In July 2015 its name was changed to Ostrava Aréna. In 2016 it was renamed OSTRAVAR Aréna after the local Ostravar Brewery.
In tennis, the arena is currently host of the Ostrava Open, a WTA 250-level event for female professional tennis players. The Czech Republic Davis Cup team has also played at the arena.
Events in other sports include the 1986 FIVB Women's World Championship, the 2005 UEFA Futsal Championship, group stage matches of the 2008 Men's World Floorball Championships. In 2010, the arena hosted the Table Tennis European Championships and the 2010 FIBA World Championship for Women.