Radiation is a standard treatment for patients with locally advanced non-small cell lung cancer. Only 5% of patients are alive after 5 years. Improvement of local control and survival time have been yielded using knowledge in radiobiology and technical innovations, especially three dimensional planning on the basis of CT and MRI. Further improvement could be reached by performing combination of radio- and chemotherapy. However, the best sequence of chemo- and radiotherapy could not be defined yet.