In the article there is presented the issue of the freedom of the parliamentary election in the Polish Constitution from 2nd April 1997. In the beginning there was explained the comprehending of freedom of parliamentary election in the legal and political plain. There was established that analysed principle wasn’t directly determined amongst constitutional rules of voting rights. On the basis of quoted argumentation there was explained that it isn’t tantamount to its elimination from the electoral system. Even without distinct distinguishing this principle is a found notion, permanently written down to the Polish electoral system. Its functioning is finding expression in numerous guarantee rules.