The rice variety Bacthom 7 (BT7) is popularly cultivated in Northern provinces in VietNam. However, it is susceptible to bacterial leaf blight (BLB) disease, caused by Xanthomonas oryzae pv. oryzae (Xoo). Xoo pathogens infect the host plant through the activation of the host genes encoding sugar transport proteins, including OsSWEET14, by TAL (transcription activator-like) -type III effectors. Precise mutagenesis at the TAL interaction sites on the promoter region of the host genes by using gene editing tools such as clustered regularly interspaced short palindromic repeats/CRISPR-associated protein-9 nuclease (CRSIPR/Cas9) a potential research direction for improving BLB resistance of major rice cultivars. In this study, genotypic analysis of CR1SPR/Cas9 transgenic BT7 rice lines determined that 82.6% of regenerated plants with single copy of transgene harbor the targeted OsSWEET14 mutation, including nucleotide (Nu) insertion and deletion. The OsSWEET14 mutations were stably inherited to the next generation with an expected segregation ratio which is consistent with Mendelian segregation (1:2:1). The preliminary phenotypic analysis suggested that the mutation of OsSWEET14 promoter did not affect the growth and yield of gene-edited rice plants. Some T; BT7 lines showed the resistance to bacterial blight pathogen VXO_11 in leaf-clipping experiment. The obtained results are a premise for development of BLB-resistant BT7 rice variety in the future.