In this study, tin-doped indium oxide nanowires have been successfully synthesized by thermal evaporation. Using field emission scanning electron microscope (FESEM) to observe the surface morphology, and using transmission electron microscopy (TEM) and x-ray diffraction (XRD) to analyze the crystal structure and growth direction, we found that the main structure of indium oxide hardly changed when slight tin was doped in. The use of energy dispersive spectroscopy (EDS) and x-ray photoelectron spectroscopy (XPS) for the materials identification, can prove that the indium oxide nanowires are within the tin doping limit. Finally, the result of the current-voltage(I-V) measurement and analysis, yielding a resistance value of the tin-doped indium oxide is 30.97 kΩ.