The issue of reviewing the constitutionality of Sejm resolutions is one of the most significant matters concerning the political system, particularly over the last ten years or so. This paper discusses the Constitutional Tribunal’s powers to examine the hierarchical conformity of Sejm resolutions as acts of domestic law, as conferred upon it by the current Constitution. The paper outlines the characteristics of Sejm resolutions and sets out the sine qua non conditions for such acts to be subject to review in proceedings before the Constitutional Tribunal. The issue of the normativity of the Sejm’s acts of internal law remains fundamental to the coherence of the legal system and the protection of the rule of law. The paper also provides an overview of the Polish Constitutional Tribunal’s case law to date regarding the review of the constitutionality of resolutions of the Sejm of the Republic of Poland since 1997. The analysis carried out in relation to the research problem at hand confirms the thesis that the current legal regulations correspond to the intentions of the framers of the constitution regarding the scope of the Constitutional Tribunal’s powers to review internal legislative acts adopted by the Sejm. The discussion takes into account de legelata observations concerning the legal provisions and practice in proceedings before the Constitutional Tribunal regarding the review of the Sejm’s resolutions for compliance with the specified standards of review. The analysis culminates in research proposals concerning the need for legislative changes at the constitutional level. This paper was written using historical-legal and dogmatic-legal methods.