Results: The frequence found HLA-DQA1 alleles common on Kinh nationality in Binh Tri Thien region is 90.6%, the alleles were found with the highest frequency of DQA1 * 0101 (25.2%), DQA1 * 0104 (20.4%), has two alleles are not found completely that are DQA1 * 0302, DQA1 * 0401 alleles.