A simple and facile method was used to synthesize poly(o-aminobenzoic acid) (PoABA) and polyaniline (PANI) nanocomposites with sodium montmorillonite (M-Na) using in situ intercalative oxidative homo-, and co-polymerization by a substoichiometric amount of ammonium persulfate. The conductive emeraldine salt form of all polymers used is inserted into the layers of M-Na to produce the hybrid with high conductivity. The properties of the hybrid are characterized by X-ray diffraction (XRD), Fourier transform Infrared (FT-IR), thermogravimetric (TG), X-ray photoelectron spectroscopy (XPS), and electrochemical response; the results show that what we obtain is really a nanocomposite. © 2012 Elsevier B.V. ; National Agency for the Development of University Research (ANDRU) ; Directorate General of Scientific Research and Technological Development (DGRSDT) of Algeria ; Departamento de Quimica Fisica e Instituto Universitario de Materiales, Universidad de Alicante (Spain) ; Belmokhtar, A.; Benyoucef, A.; Zehhaf, A.; et ál. (2012). Studies on the conducting nanocomposite prepared by polymerization of 2-aminobenzoic acid with aniline from aqueous solutions in montmorillonite. Synthetic Metals. 162(21-22):1864-1870. doi:10.1016/j.synthmet.2012.08.014. ; Senia ; 1864 ; 1870 ; 162 ; 21-22