Thalassemia is hereditary disease characterized by impaired production of the normal globin peptide. Beta-thalassemia, a common disorder in Central Africa, the Middle East, and Southeast Asia, has been rarely reported in Korea. It should be considered in the differential diagnosis of hypochromic, microcytic anemia. The genetic subtypes among the different ethnic groups vary; this may pose challenges in prenatal diagnosis or genetic counselling. During pregnancy, women with thalassemia will often show more significant anemia. Recently we have experienced Korean pregnant woman with beta-thalassemia associated with anemia. We describe this case with a brief review of the literature.