Bronisława Dłuska (Polish pronunciation: [brɔɲiˈswava ˈdwuska]; née Skłodowska; 28 March 1865 – 15 April 1939) was a Polish physician, and co-founder and first director of Warsaw's Maria Skłodowska-Curie Institute of Oncology.
She was married to political activist Kazimierz Dłuski, and was an older sister of physicist Marie Curie.