A seminar entitled Fabrication OFET nanocomposite polymer as biosensor hold at the College of Science, Department of Physics. The presenter Ali Salman Ali demonstrates the most important objectives of study synthesis organic Field Effect Transistor (OFET) as biosensor device. In this study we prepared Nanofiber conducting polymer as active layer and biopolymer using DNA salmon salt as dielectric layer to detect on the cancer using DNA Tissue cancer as target.