Sorafenib, an oral multi-kinase inhibitor, targets the Raf/MEK/ERK pathway at the level of Raf kinase and VEGF receptor tyrosine kinases, and has shown efficacy against NSCLC in Phase I/II trials. Because the targets of sorafenib are different from that of EGFR-TKI, it is reasonable for sorafenib to treat relapsed advanced NSCLC after failure of EGFR-TKI treatment.