Slovenian political concepts within the Yugoslav ideology emerged under the influence of their peripheral geographical position in relation to other South Slavic nations. The integration of the broadest possible Slovenian ethnic territory into the Yugoslav formation, whether within or outside the Habsburg Monarchy, was the fundamental political goal of the Slovenians at the turn of the 20th century. After analyzing the period from 1905 to 1949, we can agree with the assertion that Yugoslavism was often incorporated into the Slovenian national idea because the Yugoslav idea was primarily a lever for realizing Slovenian national interests. Yugoslavism, therefore, was perceived as a means of achieving partial national goals, not as an ultimate political goal. However, even though during that period, most Slovenian political parties had clearly defined fundamental goals within their own Yugoslav vision, the broader Yugoslav framework was by no means permanent. Summing up the views of the main streams in Slovenian politics, we can conclude that the function of the Yugoslav ideology among Slovenian political actors in the studied period was somewhat closer to the predominantly Croatian perspective of Yugoslavism, despite the fact that Slovenian national ideology, similar to the Serbian one, was based on linguistic theory. Most Slovenian political parties within the Yugoslav idea saw it as a supranational connecting factor that, based on equality, would enable protection for different South Slavic nations against stronger neighbors. Of course, the similarity in the fundamental functions of the Yugoslav ideology among the Croatian and Slovenian people did not imply a coincidence in the political strategies and tactics of their political elites, which often led to Slovenian misunderstanding of Croats and vice versa.