The objective of this study is to fabricate the highly electrical conducting polymer fibers applicable to many conducting materials. Therefore, we tried to prepare polyaniline (PANI) thin fiber web by an electrospinning process by the following steps. First, PANI emeraldine base (EB) was prepared by oxidative polymerization. Second, the PANI EB was doped with 2-acrylamido-2-methyl-1-propanesulfonic acid (AMPSA), and subsequently that was dissolved in trifluoroacetic acid (TFA). Third, the PANI-AMPSA solution was electrospun by an electrospinning process. Consequently, the PANI doped with AMPSA was successfully electrospun into thin fiber form, and the electrical conductivity was superior. Also, the electrical conductivity of the PANI-AMPSA electrospun was increased by a simple redoping process with AMPSA. (C) 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2012