This paper considers the selected process institutions of the new judicial-administrative proceedings in Poland. The analysis of normative material (first of all the Act - Law on proceedings before administrative courts) has been connected with the presentation of theoretical views, which are generally accepted in the Polish science. A starting point for considerations is the presentation of development of the Polish administrative jurisdiction after World War II. The second part of the paper deals with the normative bases of administrative jurisdiction in Polish Constitution. It includes considerations about the constitutional norms, which can be regarded as premises of the structure of administrative courts and the judicial-administrative proceedings. The third part is devoted to the analysis of the objective specificity of administrative courts. In the fourth part a problem of the premises of admissibility of the suing of administrative acts and actions for the administrative courts is discussed. The fifth part deals with the presentation of the object of judicial-administrative protection and the range of judicial-administrative recognition and adjudication. It includes especially remarks on the process institutions forming the principles and content of the administrative-judicial control. In the sixth part of the paper the notion of temporary legal protection in the judicial-administrative proceedings is analyzed. The final part presents general notes and conclusions about the Polish judicial-administrative proceedings. .