Cabinet of Leon Kozłowski () - cabinet headed by Prime Minister Leon Kozłowski, appointed by President Ignacy Mościcki on May 15, 1934 and serving until its resignation on March 28, 1935. Leon Kozłowski (BBWR) - Prime Minister Józef Piłsudski - Minister of Military Affairs Bronisław Piernacki (BBWR) - Minister of Internal Affairs Józef Beck (BBWR) - Minister of Foreign Affairs Władysław Marian Zawadzki (BBWR) - Minister of the Treasury Czesław Michałowski - Minister of Justice Wacław Jędrzejewicz (BBWR) - Minister of Religions and Public Enlightenment Bronisław Nakoniecznikow-Klukowski - Minister of Agriculture and Rural Reforms - Minister of Transport Emil Kaliński - Minister of Post Henryk Floyar-Rajchman - Minister of Industry and Commerce Jerzy Paciorkowski - Minister of Labor and Public Services
Changes: June 16, 1934 - Prime Minister Kozłowski became Acting Minister of Internal Affairs in place on assassinated (on June 15) Piernacki June 28, 1934 - Juliusz Poniatowski replaced Nakoniecznikow-Klukowski as Minister of AgricultureMarian Zyndram-Kościałkowski became Minister of Internal Affairs