Conversations with an Executioner (Polish: Rozmowy z katem) is a book by Kazimierz Moczarski, a Polish writer and journalist, officer of the Polish Home Army who was active in the anti-Nazi resistance during World War II. On 11 August 1945, he was captured and imprisoned in a maximum-security prison by the notorious UB secret police under Stalinism. For a time, he shared the same cell with the Nazi war criminal Jürgen Stroop, who was soon to be executed. They engaged in a series of conversations. The book is a retelling of those interviews.