Chaim Elozor Wax (1822, Tarnogród - 1889, Kalisz) was a well-known Hasidic rabbi, posek, and a Jewish leader in Poland. He was a philanthropist and accomplished student of the Talmud. He is especially known from his responsa work Nefesh Haya, and as the president of Kupat Rabbi Meir Baal HaNes Kollel Polen, Warsaw region.