The C-repeat/dehydration-responsive element binding transcription factors (CBF/DREBs) are involved in an important pathway for abiotic stress-response in plants. We have identified CBF/DREB1 gene family from Brassica rapa whole genome sequence and designated them as BrDREB1s. They contain conserved nucleus localization signal, AP2/EREBP domain, and CBF/DREB1 signature, as other known plant CBF/DREB1s. By comparative genomics, we found that nine of ten BrDREB1 genes were present in seven macro-synteny blocks co-linear to four Arabidopsis counterpart blocks and also genomic organizations of their flanking regions were very similar to those for co-linear Arabidopsis CBF/DREB1 genes. In particular, three genes, BrDREB1A, BrDREB1B1, and BrDREB1C1, were closely located within a 59 kb genomic sequence, which was similar to that of their Arabidopsis counterpart genes. However, the genomic regions of those BrDREB1 genes contained additional sequences, compared to their co-linear regions in A. thaliana. The expression of BrDREB1 genes under abiotic stresses were examined by searching microarray database and by RT-PCR analysis. All of eight genes tested were highly up-regulated during cold treatment and some of them were also responsive to salt, drought, and ABA treatment. Taken together, these results indicate that CBF/DREB1-mediated stress signaling pathway is also functioning in B. rapa. On the other hand, differences in genomic organization and gene number for CBF/DREB1 are thought to cause different response to stress between B. rapa and A. thaliana. In this presentation, we will introduce more detailed results for CBF/DREB1 gene family in B. rapa.