This Master's thesis will look at the Political trials in Czechoslovakia - The case of "Zpěvačka", it will focus on one of the many politically motivated processes that took place in Czechoslovakia during the communist regime, i.e. 1948-1989. The focus of this paper is to analyse the key archival sources, which is now an investigation by the State Security in the case of "Zpěvačka", now stored in the Archive of Security Forces. The trial of the anti-state oriented group of people around Radana Melicharová who were accused of collaborating with foreign intelligence services took place in the spring of 1957. This shows that even the so-called foundation period of the communist regime, the Communist Party of Czechoslovakia continued to implement political processes to control the opposition. This thesis brings the main characters of the process Radana Melicharová et al., describes their illegal activities and analyses the motives of each participants on illegal activities. And also discusses about the main trial itself at the Regional Court in Prague, subsequent appeal trials and the efforts to rehabilitate convicts. Contribution of the work lies in the fact that it complements many previously published scientific studies on the topic of the political process and less known and studied process with a...