On the eve of World War II, Germany was far ahead in nuclear physics research but failed to achieve a breakthrough in the atomic bomb race. The Hitler regime secretly pursued atomic bomb development but ultimately did not succeed. This article explores the reasons behind this mystery, including the loss of scientists due to racial discrimination, lack of unified guidance, stringent secrecy measures from the United States, and disruptions caused by Allied bombings. In 1984, a new insight suggested that sabotage by Polish patriots might have been a key factor.