Thin films of chemically-functionalized single walled carbon nanotubes (SWNTs) were fabricated by using a direct current (DC) electrodeposition method. SWNTs were shortened and then functionalized with acid chloride group to combine with amine group-terminated gold substrate. The electrodeposited SWNT films were characterized by using Raman spectroscopy, attenuated total reflectance infrared (ATR/IR) spectrometry and atomic force microscopy. We demonstrated that the SWNT film was well distributed on an electrode with robust adhesion.