Preoperative chemotherapy has substantial theoretical advantage. Several controlled trials are under way in early stage (clinical stage IB-II) nonsmall cell lung cancer (NSCLC). In each trial, platinum-based doublet chemotherapy is employed. Although platinum-based doublet is the treatment of choice for advanced NSCLC, risk/benefit balance might well be different in earlier stages. There have been no prospective randomized trials to choose an optimal preoperative chemotherapy in early stage NSCLC.