Based on unpublished archival documents, contemporary periodicals, memoirs and scientific literature, the author analyzes the activity of the Croatian State Parliament (HDS) in the Independent State of Croatia (NDH). During the Second World War, NDH was declared and the ruling Ustasha regime, led by head of state (poglavnik) Ante Pavelić, attempted to establish government institutions within the authoritarian system of the newly-formed state, and so, after only a year of existence of the NDH, the Croatian State Parliament was convened. During its constitution, it was already limited by the Legal Provision regarding the HDS to last until the end of 1942. The members of HDS were not democratically elected, instead, Pavelić appointed the mandates to the members of the Croatian Parliament, assemblies of 1918 and 1938, the representatives of the national parties and Ustasha officials. A relevant legislative act adopted during the HDS assembly was the decision to nullify all legislation adopted in the period from the December 1st, 1918 to April 10th 1941. All legislation had to be approved by the head of state, which shows the true extent of the Parliament’s jurisdiction. The author also analyzes the correspondence between the members of the HDS and its president, Marko Došen.