Sri Lankan cassava mosaic virus (SLCMV) is a member of cassava mosaic geminiviruses, family Geminiviridae, genus Begomoviruse which causes cassava mosaic disease (CMD). SLCMV is a widespread plant virus in major cassava production area of in Southeast Asia such as Thailand, Vietnam and Cambodia. Cassava cv. Kasetsart 50 (KU50) is one of the most globally famous cultivars in the world which is planted by many Asian countries farmers and industries. A proteomics approach was used to investigate the proteins involved in KU50 leaf response against SLCMV infection. RT-qPCR were applied to validate protein identifications for genes that are differentially expressed.