Currently, genetic modified organisms, known as GMOs more. So it has to develop How reliable and can save time and costs in check GMOs. Including products from GM itself. This study aims to investigate the contamination of genetically modified soybeans. The market by PCR. The Multiplex PCR technique developed for use in verification faster. The study found that DNA extraction method from modified CTAB method adapted from Agrawal et al., (1992) from the soybean samples through privatization and privatization. DNA can be extracted while nine samples can be detected CaMV 35S promoter and 8 samples detected. nos-terminator In addition, the second sample is also detected gene EPSPS, and when the technical development Multiplex PCR can detect gene lectin in soybean CaMV 35S promoter, including gene lectin with gene EPSPS CaMV 35S promoter with the gene EPSPS and. CaMV 35S promoter, together with the nos-terminator.