Among the studied conductive polymers, polyaniline (PAni) is the most promising one, due to its relatively good solubility and environmental stability. In this work we prepared a poly(amide-imide) and polymer blends with PAni. by solution of both polymers in NMP. These polymers were able to form blends in any proportion and characterized by DSC, TGA, FTIR and microscopy techniques (optical and AFM). The glass transition temperatures (Tg) of the blends showed a decrease with PAni contents, indicating that no phase separation occurred in the blends. The microscopy techniques showed that the blend is completely compatible, and the FTIR spectra indicating strong interactions between the components. Preliminary conductivity evaluations showed a conductivity of 10(-3) S/m for blends with 60% PAni. The films may be also selectively crosslinked by thermal treatment, yielding a completely insoluble, extremely flexible, resistant and, depending on the PAni content, very clear and transparent material.