First Lieutenant Adolf Opálka (4 January 1915 – 18 June 1942) was a Czechoslovak soldier.
He was a member of the Czech sabotage group Out Distance, a World War II anti-Nazi resistance group, and a participant in Operation Anthropoid, the successful mission to kill Reinhard Heydrich.
Opálka was born into a middle-class family in Rešice and joined the Czechoslovak Army in 1936 where he served in the 43rd Infantry Regiment in Brno.
The Munich Agreement and subsequent German occupation of Czechoslovakia led to the disbanding of the Czechoslovak Army, and Opálka's career ended.
He escaped to North Africa where he served in the French Foreign Legion, and he later returned to France.
He then joined the Out Distance group and participated in Operation Anthropoid.
He was found days later by the Nazis, and he committed suicide in the Church of Saints Cyril and Methodius in Prague after a gunfight in which he was injured.