In this paper, conductive. nitrogen doped diamond-like carbon (N-DLC) films were deposited with dc magnetron sputtering, and their performance in acids as well as application as working electrodes for lead stripping analysis had been studied. It was found that N-DLC film has a double-layer capacitance about 3.45 muF-cm(-2) in 0.5 M H2SO4, a wide potential window in acids, and a high catalytic activity for Cl-2/Cl-. The N-DLC electrodes also had a high signal of Pb2+/Pb-0, and their stripping detection limit without mercury coating was about 76 nM in 0.1 M KCl (pH1) solution. Their double layer capacitance, width of potential window, and stripping detection limit are comparable with that of boron doped diamond film electrodes. N-DLC film has shown to be a suitable work electrode material for electrochemical sensors.