Summary form only given. Polypyrrole(PPy) is one of the most stables conducting polymers due to its high thermostability and life stability. In general, it has been known that PPy films can be synthesize by anodic electropolymerization, oxidative chemical polymerization and plasma enhanced polymerization. We have synthesized polypyrrole(PPy) nanofilms using vapor-phase oxidative polymerization process in a vacuum chamber under ultraviolet (UV) photon irradiation. That time, we measure the current through conducting polymer connected with two electrodes by Kiethley 2400 multimeter. Vapor-phase polymerization techniques for the preparation of PPy of nanofilm type require that pretreated substrates be essentially activated with inhibitor. In this case, an insulating substrate is pretreated with polymer containing electron acceptors and initiators such as ferric chloride. PPy nanofilm that was irradiated by UV photon are rapidly synthesized and current of two electrodes increased. These PPy nanofilms are characterized by atomic force microscopy (AFM), Raman spectroscopy, Fourier-transform infrared spectroscopy (FT-IR) and field emission scanning electro microscopy (FE-SEM). Possible mechanism is proposed for the formation of the PPy nanostructure during the vapor-phase oxidative polymerization