EN
Henryk Kołodziejski (1884-1953), creator and long-term director of the Sejm library in the interwar period, was known for his socialist passion and involvement in the cooperative movement. He also played a quite significant but implicit role on the political scene, participating in informal negotiations or other meetings on matters of the highest state rank. In the article, I try to show how his person influenced the functioning of the parliamentary library and its position in the structure of the Sejm Bureau. I also ask whether there was a connection between the strong position of the library and the lack of a legal office in the pre-war Polish Sejm. I show the change in the action strategy of H. Kołodziejski after the war. I present his activity on the basis of parliamentary documentation.